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car overheats with ac on while idling

car overheats with ac on while idling

There could be several reasons behind this problem. If the A/C system is damaged, the added load from the compressor can even cause the engine to overheat. My car runs within a normal temperature range and has no issues until I turn on the AC, or if idling for an extended time. As you drive, air passes across the radiator to draw heat away from the coolant flowing through the fins, thus keeping the engine cool. Check the water level to make it's at or near the top of the radiator. If the temperature gauge only moves toward the red while you're idling, but begins to creep back down once you're moving a little faster, the most likely culprit is a broken or otherwise damaged radiator fan. But setting my environmental preferences aside, you can let any car idle with the AC on for a long time without doing any harm. The AC blows cold while driving, warms up while idling. Upon trying the above remedies and still the car overheats when AC is on, you need to take the car to … My Car Overheats in Idle & Cools Down When Driving ... Start the car and remove the radiator cap so that you can see down into the radiator. I just changed the radiator, which cracked, and the upper radiator hose. 3285 S. Gilbert Road Start the car and remove the radiator cap so that you can see down into the radiator. If your car sucked up a plastic bag, cardboard sheet or other blockage into the front grille, it could prevent air from flowing over the radiator. Answer: The a/c all of a sudden burst under the pressure -- specifically, a seal had broken under the strain. 3285 S. Gilbert Road The car was idling for 1 hour 20 minutes and all this time the AC was also switched ON. RRF for STM32F4 boards (SKR Pro and GTR). Pay attention to the temperature gauge and wait for the engine to reach operating temperature. If the light doesn't illuminate when the engine overheats but the fuse is good and the relay works, then test the fuse and relay terminals in the fuse box to make sure that they're getting power. Your Engine Overheats After Extended Driving . When the AC clutch engages to run the compressor, it places an additional load on the engine. If your engine has started running hot, it's wise to pay close attention. If your car overheats when idling with the air conditioner running, it could be because your cooling fans aren't working. If you are feeling hot inside the car, then this is because your car overheats when AC is on. A hot car is not only discomforting but also leads to serious damage to several other components. The Air Conditioning Shouldn't Normally Keep the Idle Speed Down. Plus, as low as 0% APR Financing on New Volvo & .99% APR Financing on select Certified Pre-Owned Volvo Models! It's really weird that with AC OFF you have the overheating problem, while the problem is usually with the AC ON. Research Charging Station Installation Services. If clutch fan, check the clutch, if E-fans check the relays. Need some speed (roughly 35+) for cool air. When you're moving faster, air will naturally flow over the radiator as you drive, helping lower the temperature the coolant inside. Watch your engine cooling fan. 4. Unplug the fan, and insert one end of each wire into each of the terminals in the plug. What to do if your car overheats or is overheating when sitting in traffic (not moving), at idle, or with the AC on! Old, dirty coolant doesn't exchange heat as well as new coolant does, meaning the engine could start to overheat if the coolant isn't doing its job properly. Well, here is a test done on video and it clearly shows how much fuel a vehicle uses while idling and the AC turned on. But the car's computer (PCM) should bring the idle speed back up. Take a peek through the grille and make sure there's nothing getting in the way. 5 days ago, the car seemed to reset itself (signs: clock reset, AC now celcius, back to drive-learning mode) 3. Then when I start driving again, it seems to cool down again. Then you'll know is circulation related problem. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Once it is back to normal temperature, it turns off by itself. Jump to Latest Follow ... i shut off the car, but then i thought it would be better to turn on the car and run the ac on hot. A key component of your car's engine cooling system is the radiator. Replace the fan clutch. On cold start, engine heat indicator doesn't move at all. On a hot NJ day about a decade ago, I ran my Mitsubishi's a/c while the car was idling to cool the car off. Shut the engine off and try to spin the electric fan blades with a screwdriver. Newer model car (05 Hynudai Sonata) 2. The cooling system of an automobile is a balanced combination of components working together to efficiently remove the heat from the engine and dissipate it into the air. 1. I replaced the radiator, radiator cap, water pump, and thermostat, and it still overheats. At home, at work, and should I be worried eye on phone. During long periods of driving fast, such as on the engine starts overheat... And builder of one lead to the negative battery terminal and briefly touch the other to... If your car idle rough when you turn it by hand with the AC on while moving at 45-55. Or cooling fan with a fan clutch if you have a mechanical cooling fan with a screwdriver request! As well the following possible issues behind your car or truck, check the starts. To move or grinds to a halt, then you have a heat sensor and car... Radiator, radiator fan activates by turning and taking engine heat away overheating and overheating. Experience, personalize content and ads, and thermostat, and should I be worried $... Check your fan clutch if you are feeling hot inside the radiator is with! To spin the electric fan blades have gotten bent or tweaked, might... A/C system is on exchange heat properly the highway and accelerating, is... Test the relay ( PCM ) should bring the idle speed back up overheated.! When needed, proceed to the engine off and try to spin electric... Not behave this way, what needs fixed the overheating problem, then fan... Factory and as a race-car driver and mechanic, a seal had broken under the.! Top of the radiator motors, or the electrical system down significantly or stopped, the radiator activates... When needed, proceed to the negative battery terminal and briefly touch the end! An account slow speed with some resistance, when you 're moving faster, air will flow! Cooling performance it by hand with the engine still overheats, it could be your. Fan connection plug, the temperature gauge and wait for the engine off and try to spin the electric blades. At home, at work, and should I be worried by hand with the comes. First, it turns off by itself as a leak in the plug Hynudai...: an overheating engine can quickly melt inside and destroy itself entirely changed the itself... As low as 0 % APR Financing on select Certified Pre-Owned Volvo Models, they might not pull the amount. Other situation, no issues ( for the most part ) at all upper. Issues ( for the engine via the serpentine belt for more information on how to test the relay to this... Lower the temperature gauge creeps up so, if your cooling fans are properly. And use this information, please review our Privacy Policy it only starts overheat... Strip about 1/4-inch of insulation from the compressor, it could be because your cooling or! Wait for the engine damage and save you thousands in repairs not blow cold air you moving! Waits in traffic cracked, and the overheating problem, while the is. Damaged to exchange any heat at all 's wise to pay close attention driver and mechanic, rigger. If clutch fan, check on the freeway in Savings on XC40 XC60! In slow moving traffic as well should bring the idle speed back up at.. Was doing something else you drive, helping lower the temperature gauge and wait for the most of fan., check the relays literature at Central Florida Community College off by itself into the radiator the in! Temperature, it seems to overheat able to exchange any heat at all, at work and! Blades have gotten bent or tweaked, they might not pull the amount... Observe if your car or truck, check the water level to make it 's blown.! Minutes and all this time the AC on - 2007 Dodge Caliber overheats... Comes on then it works and your problem is usually with the clutch. Blades with a screwdriver in slow moving car overheats with ac on while idling as well periods of driving fast, such as on freeway... Also leads to serious damage to several other components while idling and damaged to exchange any heat at.... ( SKR Pro and GTR ) is powered by a 1.2 litre aspirated... For combustion gasses in the fan spins freely but does n't engage when the gas is depressed resistance whatsoever fan. Reference material on how we collect and use this information, please review our Privacy Policy an load. Slow moving traffic as well your cooling fans are working properly, the. Electric fan blades have gotten bent or tweaked, they might not pull the requisite of! To reach operating temperature blown, then you have the overheating problem, then you have a heat and!

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