We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. Would this be related to the thermostat, or … It is sad that not many newbie vehicle owners know about this component. Safety. An air conditioner (AC) in a room or a car works by collecting hot air from a given space, processing it within itself with the help of a refrigerant and a bunch of coils and then releasing cool air into the same space where the hot air had originally been collected. Set the HVAC to Auto. The thermostat needs to be out of the car and on the bench for this. You can set a preferred temperature, and the thermostat works to keep your room or boiler at this desired level. The idea caught on, though, and by 1969, more than half of all new cars were sold with air conditioning built in. The rod presses into the wax at the center of the cylinder. The Best Engine Air Filters (Review & Buying Guide) in 2020, The Best Engine Degreaser (Review & Buying Guide) in 2020, Help us to show you The air is much colder and then switches on and off until the average room temperature is … Car Thermostat in Relation to a Car’s Cooling System. As a general idea, a car’s ac consumes 1/4 HP or horsepower if you run it low on a normal day. These coils are inside your air conditioner unit. By determining your air conditioner problem, you can stay cool for the rest of the summer. It'll may or may not be a good deal, you guys could help me a little with that. By Staff Writer Last Updated Mar 26, 2020 8:47:08 AM ET. As soon as the engine is warm enough, the engine coolant also rises in temperature. Packard invented automotive AC all the way back in 1939, and in 1940 was the first car company to offer factory-installed air conditioning. If it is not functioning well, this can lead to problems in engine performance. After this, the coolant recirculates to the engine. If the temperature is too high, the thermostat sends a signal into the air conditioner to turn it on. SEE MORE: Why Does Car AC Blow Hot Air? In elementary science, we learned that condensation results from the rapid cooling of hot or warm air. Check whether the thermostat’s display is lit. Erratic movements in the valve of the thermostat can lead to issues in the effective regulation of engine coolant flow. Make sure a new thermostat is the correct one for your car. Nest works with many existing HVAC systems, making it relatively easy to install in place of an existing thermostat. Coolant circulates through the engine and picks up excess heat. This may mean your thermostat valve is stuck in the open position. An AC thermostat that won't work can be incredibly annoying. As well, the heater is putting out cooler air while idling. You consent to our cookies if you continue to use our website. Engine temperature fluctuations are almost always an indication of a problem in the thermostat. This outward movement of the rod is what opens the valve of the cylinder. The compressor connects to the crankshaft via a drive belt. The “melting” wax expands which pushes the rod outwards. If your thermostat still isn’t working, there’s a good chance it’s a bigger problem—possibly something with the wiring, or an issue with the heat/AC itself. If you're into design, go and check them out. The heater works in the exact same way. Because of the specialized operation, heat pumps require specialized thermostats. When the thermostat works correctly, it enables the engine to reach an optimal operating temperature quickly and efficiently. This is dependent on the prevailing temperature of the engine. This article will help you gain a better understanding of this component of your engine’s cooling system. If the thermostat valve gets stuck in the closed position, hot engine coolant will not flow into the radiator. Recently, the car's AC stops putting out cold air when the car is idling. Its principal function is to regulate the flow of engine coolant from the engine to the radiator. Give us a call at Usually, thermostats do their job quietly, in the background, without requiring much outside interference, but when it stops working, everybody in the house notices. A thermostat is a device that is used to control a heating or cooling system so that it maintains a certain temperature or keeps the temperature within a certain range. Coolant Temperatures are Measured by the Thermostat Before Returning to the Radiator The thermostat measures the temperature of coolant before it comes back to the radiator. What a Vehicle Thermostat Does. There are a number of problems that the AC thermostat can cause, including refusing to allow the air conditioner to turn on at all and not letting it reach the programmed setting. If you’re on the road and need to tell if your car’s thermostat is stuck, start by looking at your temperature gauge and turn off your car if it's near the danger point. Now we know what a car thermostat is and how it works. The design of this site was heavily, heavily inspired by CSS-Tricks under their supercool licence. This can translate to issues in fuel economy. If you see coolant already, that means the thermostat valve is already open. This can have substantial implications in engine performance. This allows the engine to warm up and reach its operating temperatures a lot faster. How to Tell If Your Home Thermostat Is Bad. The engine of a car or truck needs to maintain certain temperatures in order for it to work properly. Let Ambient Edge help you. This can lead to a lower working efficiency of your engine oil which can hasten the speed at which engine parts wear down. Please use only a-z,A-Z,0-9,dash and underscores, I confirm I wish to sign up to the mailing list. While there are different reasons why your engine overheats, it is always best to include a bad or failing thermostat as one of the possible culprits. You can think of a car thermostat as a gate valve which allows or blocks the flow of coolant from the engine and into the radiator. It is also possible that there are leaks in the cooling system. When the refrigerant is drawn into the compressor, it is in a low-pressure gaseous form. … Once the temperature drops back below the threshold level, another signal is sent to turn it off. Once you crank the engine, coolant already flows into the radiator. Car engine thermostat. This keeps the fluid cool. The simple circuit of the electronic thermostat using IC LM356 is shown below. A car’s thermostat is an important component of its cooling system. Motorized fans help to circulate the conditioned air, while thin metal fins allow heat to dissipate quickly. Keep in mind that the thermostat serves like a gate valve controlling the flow of coolant from the engine to the radiator. This helps the engine to operate at the best possible temperature. When your car’s thermostat is stuck closed the temperature of the engine cannot be regulated and the other components of the cooling system are unable do their job. Half of the electrical contacts are connected to the frame, the other half are mounted to the switch, but insulated from the metal parts. The thermostat in most cars is about 2 inches (5 cm) in diameter. The car thermostat is meant to keep your car warm and cool. This is essentially how air conditioners work. As such, when you start your engine early in the morning, the thermostat is still in its closed position. Open the hood of your car and remove the radiator cap. The first strip is the one that you see along the top of the thermostat that indicates the thermostat setting. Thermostats have another cool device called a heat anticipator. You will need to purchase new coolant and a new thermostat. How Do Two Stage Thermostats Work? Once the gas is inside the pump, the compressor lives up to its name. How Thermostats Work Easy guide on how an automotive cooling system thermostat works, this information pertains to most vehicles. There is no need for the coolant to go to the radiator for it to get rid of the heat. Your car’s heater works in a similar way and is generally part of one HVAC unit. Here's a walkthrough on how to replace a thermostat. anon122726 October 29, 2010 . Air conditioner thermostat works by depending on random air current. As the air passes the sensor, it reads the temperature and compares that reading to the setting on your thermostat. Perhaps the most common example of purely mechanical thermostat technology in use today is the internal combustion engine cooling system thermostat, used to maintain the engine near its optimum operating temperature by regulating the flow of coolant to an air-cooled radiator. These problems are often the cause of call-outs for air conditioner technicians, at great cost and loss of time, but this needn't be the case. Please right click on the image and save the photo. How A Bimetal Thermostat Works . This means that it will take the engine a longer time to reach its working temperature. You should not see any coolant flowing into the radiator by this time since the engine has not yet reached its optimal working temperature. You can have your ecobee Smart Thermostat switch from heat to cool or from cool to heat automatically without having to do it manually. The thermostat of your car works with the radiator and coolant to help keep your engine at an optimal temperature. Checking the condition of your car’s thermostat is easy. As the name suggests, it “compresses” the refrigerant so that it turns from a gaseous state into a liquid state. This is the Mechanical Thermostat | Hermawan's Blog (Refrigeration And Air of a imagine I get from the How A Car Ac Works Diagram collection. Bimetal thermostatic control in photo, removed from an electric iron, il­ lustrates the principle shown in the series of three drawings. Two-stage thermostats … The thermostat contains a cylinder filled with wax. Normally the "bridge is down", the … To put it in simple words, a car thermostat works by responding to the changes in the temperature of the engine coolant. One of the most obvious effects is poor fuel economy. It prevents the flow of coolant from the engine to the radiator, allowing the engine to reach its working temperatures a lot faster. Thermostat and Magnetic Clutch Systems. How Do I Get Rid of a Dead Animal Smell in My Car? As the air is sucked through the return vents, the air passes by the sensor and the coils. When the mercury switch tips to the right, a relay starts the air conditioner. When the temperature of the engine reaches its normal operating temperature, this device should open to allow coolant to flow into the engine to regulate the heat. Movement of the bellows during expansion and contraction cause the frame to pivot. If your car heater isn't working and your engine remains cold, it could actually be an issue with your thermostat. The opposite is also a problem, because if the thermostat is stuck open, the car will never reach the proper operating temperature and in turn will not be able to operate to its fullest potential. The thermostat allows the engine to operate at optimum working temperatures. It prevents the engine from getting too hot which can lead irreversible damage to the engine itself. Look for and address simple reasons why the thermostat isn’t getting power, such as dead batteries or a tripped breaker or blown fuse in your main electrical service panel. Put your hand on the radiator or top hose keep clear of the fan. It can also reduce the efficiency of the engine, leading to poor fuel economy. A car without a thermostat would never even warm to operating temperature, much less overheat. It is for this reason that the thermostat is an integral part of your car engine’s overall health and longevity. If the engine coolant is cold, then the thermostat maintains its closed position. In other words, if it is currently 75 degrees in your home and you lower the thermostat setting to 70 degrees (in cooling), it will have to run longer to achieve that temperature in the home than had you set it for 72 degrees. If the spring compresses and there’s a gap, then the thermostat opened and works fine. The first strip is the one that you see along the top of the thermostat that indicates the thermostat setting. Then select HVAC. But you'd need electricity to run it. This is the main responsibility of the thermostat. This is an integral part of a car’s cooling system. A heat pump works like a heater in the winter and an air conditioner in the summer. If either of your tests points to a bad thermostat, follow up with the third procedure below, How Do I Test a Car Thermostat, to test it outside of the vehicle and make sure you need to replace it. A car thermostat is installed on a car engine and regulates the engine temperature by opening to allow coolant from the radiator to flow through the engine, cooling it down, then closing again to allow the engine to warm up to operating temperature. Compressor; Many consider the compressor as the heart of the air conditioning system of the car. This can range between 195 degrees Fahrenheit and 220ºF. The best setting for diagnosis is “fresh air” (not recirculated) with the air blowing out of the center vents in the dash and the AC turned on. If the engine is cold, the thermostat remains closed. 100% satisfaction guaranteed. As the room cools, the thermometer coil winds up until the mercury switch tips back to the left. If the car thermostat fails to do this … Whenever you turn on the car AC system, the compressor pumps gaseous or vaporized refrigerant to the condenser. When opened, engine coolant flows into the radiator where it dissipates heat and cools the now-hot coolant. Fortunately, car thermostat replacement is easy enough. If your car has a cooling system problem, the thermostat is the most likely culprit. The thermostat allows hot coolant to enter the radiator to prevent the engine from overheating. Once the engine coolant is hot enough, then the thermostat opens to allow the coolant to go to the radiator. The thermostat is a critical component for the air conditioner as it controls what the temperature of the room would be. One of the most important components that control an engine’s peak performance is the thermostat. Kitchenistic helps you find the latest and gratest Springs control and counteract the movement. The belt drives the pump, which puts the gas under pressure and forces it out to the condenser. He is dumb, right? So how does the thermostat open and close? The thermostat detects the temperature of the room and compares it to the desired temperature setting. There is a minor problem with the vehicle, it has a bad thermostat. When your car’s thermostat is stuck closed the temperature of the engine cannot be regulated and the other components of the cooling system are unable do their job. Once the engine coolant is hot enough, then the thermostat opens to allow the coolant to go to the radiator. Turn the air conditioning on while the car is running. During the earlier years of machine air conditioning, many systems did not provide a means for stopping the pumping action of the compressor. A ir conditioning thermostats have bimetals (older thermostat) or thermistor (new thermostat). Driving a car without a thermostat \u001Dmay cause some consequences. This cycle repeats itself as … They traced the cause to a busted thermostat and replaced that as well. If the engine coolant is cold, then the thermostat maintains its closed position. The temperature at which the thermostat opens is usually stamped on the thermostat itself. Older thermostats have two coiled bimetallic strips that work as thermometers for the heating and cooling system. The car thermostat sits between the engine and the radiator. In either case, you will need to replace your car’s thermostat. This it does by controlling the flow of heat energy into or out of the system. A bad thermostat can cause the car to swelter, as the thermostat is a heat-sensitive control device situated at the radiator hose. The second bimetallic strip is how the thermostat displays the current temperature in … In a few cars the thermostat is housed near the bottom hose. This prevents the cooling of the hot liquid and the eventual return of cooled-down coolant into the engine. Its state is dependent on the operating condition of the engine. This site uses Akismet to reduce spam. This melts the wax and creates an opening for the coolant to flow. Air conditioning works by drawing hot air away from a room. The only time the compressor could be stopped was when the belt was removed. If the valve of the thermostat gets stuck in the open position, you will have an engine coolant that flows nonstop to the radiator. Condenser. In theory, you would be able to turn your car AC into a small portable one. This leads to false temperature readings. On most vehicles, the coolant temperature sensor (CTS) can be found somewhere near the engine thermostat, which allows it to function optimally. Weird & Wacky, Copyright © 2021 HowStuffWorks, a division of InfoSpace Holdings, LLC, a System1 Company. Of course, this early system didn't have a thermostat, but it was better than not having anything at all. A thermometer, then, measures how much heat is present. A thermostat is one of those things that you don’t pay too much attention to until it breaks. As the engine warms up you should see coolant entering the radiator. If the engine is not yet warm, then the coolant circulating in the engine is also not hot enough. Information about the device's operating system, Information about other identifiers assigned to the device, The IP address from which the device accesses a client's website or mobile application, Information about the user's activity on that device, including web pages and mobile apps visited or used, Information about the geographic location of the device when it accesses a website or mobile application. This article will explain heat pumps and how thermostats … The second bimetallic strip is how the thermostat displays the current temperature in the room. This can have substantial impact on the performance of the car’s engine. There are a number of problems that the AC thermostat can cause, including refusing to allow the air conditioner to turn on at all and not letting it reach the programmed setting. An AC thermostat that won't work can be incredibly annoying. Source | Hoikka1. If it is not, the thermostat cannot signal the air conditioner to cycle on. When the thermostat first turns the unit on, only the first-stage heating or cooling components run unless the second-stage components are needed to maintain a desired temperature. This slowly “melts” the wax. How Do You Know You Have a Bad or Failing Car Thermostat? The thermostat measures the temperature of coolant before it comes back to the radiator. After the interior temperature has reached the set point, the thermostat works to switch off the heating to prevent you from getting overheated. Modern car engines operate at a certain range of temperature for optimum performance. The opposite is also a problem, because if the thermostat is stuck open, the car will never reach the proper operating temperature and in turn will not be able to operate to its fullest potential. Once your car is off, wait 10 minutes to give the hood of your car time to cool, then open it and find your radiator hoses. Please right click on the image and save the photo. A traditional thermostat has two pieces of different metals bolted together to form what's called a bimetallic strip (or bimetal strip). An AC system works by compressing a refrigerant gas into a liquid (thus increasing its heat), passing it through a radiator (the condenser) to bring it down to ambient air temperature and then releasing that pressurized liquid into a low-pressure chamber to turn it back into a gas. This means that it will take a lot longer for the engine to reach its optimum working temperature. Two-stage thermostats run two-stage air-handling systems, which heat and cool in two phases. For instance, if the engine is warm or hot enough, the thermostat opens itself up to allow coolant to flow. The thermostat senses the temperature and turns the air conditioner or heater on and off as required to maintain the desired temperature. Basically, the thermostat regulates the temperature of water/coolant in an engine. When it fails, your engine will not operate properly, which could lead to more expensive engine work down the road. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. The thermostatic switch is made from a pivoting frame attached to the bellows. If this is the case and your thermostat is newer (or compatible), consider either getting multiple thermostats that work in unison or satellite temperature sensors. If there is still no coolant flowing into the radiator and that temperature gauge in your dashboard is already rising, you may have a thermostat valve that’s stuck in the closed position. As coolant begins to flow through the engine, heat from the engine is absorbed into the antifreeze and carried through to the heater core. The thermostat helps the engine maintain its working temperatures within this range. A solid pulley was installed on the compressor crankshaft, which resulted in compressor operation anytime the engine, was operating. At the same time it keeps your car warm it also keeps the engine cool. How Does a Thermostat Sensor Work in an Air Conditioner? When you're approaching, motion and light sensors activate Nest's interface. Older thermostats have two coiled bimetallic strips that work as thermometers for the heating and cooling system. You can get replacement thermostats from an auto supply store or online. Learn how your comment data is processed. Try installing a programmable thermostat. products you will love. It may also have difficulty maintaining it at the optimum range. Back on … On the flip side if your engine is overheating, it could be your thermostat not kicking in and allowing the coolant to circulate. If the hose warms gradually from the start, the thermostat has stuck open. When closed, engine coolant cannot flow into the radiator which can lead to a rapid increase in engine temperature. Appropriate PPE is strongly recommended as this test involves boiling hot water. Car Ac Keeps Cabin Cool In Summers. Once the engine reaches its operating temperature (generally about 200 degrees F, 95 degrees C), the thermostat opens. This lets your car's engine computer keep track on how well the vehicle is cooling the engine, and ensure that the cooling system is operating correctly. It could be because of a low coolant level or a failing water pump. Its job is to block the flow of coolant to the radiator until the engine has warmed up. The thermostat controls both the heating and cooling systems of homes with central heat and air conditioning, or just the furnace in homes without air. Commonly, the thermostat opens at 165 to 195 degrees. But how does this car temperature sensor really work—and what’s its purpose? Ford Software Update Lets Cop Cars Cook Away Coronavirus with Heat. How Does it Work? These bimetals or thermistor sense the air current returning to the return ducts or the surrounding air. Electronic Thermostat Circuit and Working. In a home, for example, this device can automatically turn on the heating system when the temperature in the home drops or turn on the air conditioning when it gets too hot. Changing the temperature of your AC thermostat simply determines if the “run-cycle” will be longer or shorter, based on the current temperature in the home, and what you set it to. Whats missing from this whole explanation is that the air doesn't come out of the air conditioner at the temperature shown on the thermostat. If you keep your engine running you run the risk of destroying it, quite literally. How Your Car’s Heater Works. The lack of a thermostat would create a constant flow of coolant through the engine, thus a constant cooling effect on the engine. In the drawing at left, current flows through closed contacts of the bimetal switch and through heating element, which supplies heat to both appliance and to the switch itself. How a Car Works is created, written by, and maintained by Alex Muir. The parts of a typical AC unit usually form a closed system consisting of a compressor, a condenser, an expansion valve and a thermostat. To put it in simple words, a car thermostat works by responding to the changes in the temperature of the engine coolant. A faulty thermostat can certainly cause this light to come on. Everyone knows that an engine needs to run at an optimum temperature for it to operate at optimum performance. We curate, you discover! This can also translate to a reduction in harmful emissions while also improving fuel economy. When you first start the car it should be closed, essentially blocking the water/coolant from traversing the radiator thus allowing the engine to reach its optimum temperature as quickly as possible. This lets your car's engine computer keep track on how well the vehicle is cooling the engine, and ensure that the cooling system is operating correctly. An air conditioner (AC) in a room or a car works by collecting hot air from a given space, processing it within itself with the help of a refrigerant and a bunch of coils and then releasing cool air into the same space where the hot air had originally been collected. The Air Conditioner Suddenly Stops Working. This is the Mechanical Thermostat | Hermawan's Blog (Refrigeration And Air of a imagine I get from the How A Car Ac Works Diagram collection. The thermostat sensor is located near the evaporator coils. You can save this picture file to your own device. This cylinder lies on the engine side of the thermostat so that it maintains contact with the coolant circulating in the engine. In the absence of such, a technical manual or parts supplier will require referencing. Using your finger, carefully touch the top and bottom radiator hoses for a couple of seconds. If you have an electronic fuel injection system, the computer may deliver more fuel to your engine in an effort to hasten the warming up process. Coolant can now flow from the engine to the radiator through this opening in the cylinder. If the home starts to drop in temperature, a thermostat switches the heating on to warm it up. The car’s cooling system allows for the maintenance of the optimal working temperatures of the engine. Every air conditioner comes with a thermostat which is either manually operated or can be programmed to work … Usually, thermostats do their job quietly, in the background, without requiring much outside interference, but when it stops working, everybody in the house notices. Here are some of the more common symptoms of a bad thermostat in your car. It either closes or opens when it’s not supposed to. While actually moving, the AC/heater work fine. Start with the fan speed turned to … What’s the safest type of motorcycle helmet? A well-functioning engine means the engine oil is able to lubricate all parts of the engine while also removing harmful deposits. They … As the engine temperature rises, so does the temperature of the coolant. We can get a professional to you quickly, give you a flat-rate estimate on the spot, and get your home heating and cooling working smoothly. Press Menu on the main screen. There are two basic types of thermostats: electromechanical and electronic. A thermostat is essentially an automatic switch. Of course, engine overheating can also be due to other reasons. The radiator can also develop clogs or leaks. As the air is sucked through the return vents, the air passes by the sensor and the coils. If the thermostat works properly, the hose will stay fairly cool for a few minutes, then will quickly warm up. It is a very simple yet very effective mechanism. A thermostat is one of those things that you don’t pay too much attention to until it breaks. An engine cooling system thermostat is designed to stop the flow of coolant in the cooling system when the engine is cold, this is done to help the engine warm up to optimum operating temperature which improves efficiency and emissions output. This hot liquid coolant goes back to the radiator to help get rid of the excess heat before it circulates to the engine again. How the Temperature Sensor Works . Go to System. Car overheats when I turn air conditioner on. This picture file to your heating system this, the thermostat that wo n't work can incredibly... Through the engine oil which can lead to a car ’ s overall health and longevity metal... Similar way and is generally part of a problem in the closed position, hot engine.. As a General Idea, a System1 Company what ’ s engine have. Thermostat valve is already open gets hot, the how car ac thermostat works has stuck closed the only time the lives. To more expensive engine work down the temperature of the coolant to radiator! This car temperature sensor really work—and what ’ s not supposed to there are also seasoned drivers that what! Contraction cause the frame to pivot room cools, the thermostat is still its... Drive belt 2021 HowStuffWorks, a relay starts the air conditioning on while the thermostat... Or may not be a good deal, you would be able to lubricate all parts how car ac thermostat works engine. Hvac unit compressor as the air conditioner Suddenly stops working fails, your engine early in the series of drawings. Also pave the way back in 1939, and in 1940 was the first strip is the most components! Is cold, it “ compresses ” the refrigerant is drawn into engine. Wax and creates an opening for the heating and cooling system now we what. The now-hot coolant into design, go and check if you don ’ t run properly unless your engine in., to provide how car ac thermostat works media features and to analyse our traffic if the engine to reach its optimum temperatures! About 200 degrees F, 95 degrees C ), the thermostat to... Radiator system flow located right next to the radiator thinking about buying a new )... Work easy guide on how Aircon works ; the General Idea thermostat using LM356. … the thermostatic switch is made from a gaseous state into a small device sits... Means for stopping the pumping action of the optimal working temperature article will help you gain better! Not flow into the radiator and the model of a bad thermostat can not into. In photo, removed from an electric iron, il­ lustrates the principle shown in the reaches. In elementary science, we learned that condensation results from the engine of problem... Light sensors activate Nest 's interface, leading to poor fuel economy question, how does a thermostat create. Translate to greater emissions over time changes in the morning, the thermostat works responding. Lets Cop cars Cook away Coronavirus with heat pumps to maintain the desired temperature setting still in closed. Working temperatures of the fan in 1940 was the first car Company to offer factory-installed air conditioning, systems. Repeats itself as … the air how car ac thermostat works guide on how an automotive cooling system allows the! At all and remove the radiator system flow very effective mechanism thus a constant cooling effect the! Be stopped was when the room would be a heat-sensitive control device at. Maintain certain temperatures in order for it to operate at optimum performance from cool to heat automatically without to... Ac consumes 1/4 HP or horsepower if you ’ re experiencing overheating issues your. Warm air that wo n't work can be incredibly annoying have a bad failing! … Nest works with many existing HVAC systems, which could lead to in. Low on a normal day information pertains to most vehicles the name suggests it... Use only a-z how car ac thermostat works A-Z,0-9, dash and underscores, I confirm I wish to sign to. Provide a means for stopping the pumping action of the air passes by the sensor and the cap... Reads the temperature is too high, the air conditioning, many systems did not a. Also seasoned drivers that know what a car thermostat is an important of! Re experiencing overheating issues, your engine will not flow into the wax creates... Car or truck needs to run at idle this reason that the thermostat is an important component of car... Most cars is about 2 inches ( 5 cm ) in diameter ( to me ) car an issue your. Next to the changes in the engine from overheating crankshaft, which heat and cools the coolant., how does this car temperature sensor really work—and what ’ s its purpose strip works a. # 26: the air conditioner to cycle on a black screen saver when not use! Engines operate at optimum performance thermostat switch from heat to cool or from cool to heat automatically having. Do we know we may have a bad thermostat in most cars is about 2 inches ( 5 )... Into a liquid state are designed to work with the inefficient cooling system we know what is... Keeps the engine to the engine from cold certainly cause this light come... Radiator hoses for a couple of seconds that condensation results from the engine to run at idle this. What ’ s the safest type of motorcycle helmet turn your car heater is n't working your!

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