I took it to my mechanic and he found that the radiator was leaking. GARYHYCAR MEMBER; 2004 HYUNDAI VERNA; Hi guys I have a problem with a hyundai verna model from 2004. Condeser fins were smashed pretty bad. Ask Question Asked 1 year, 10 months ago. If the car only overheats at idle the most likely cause is the cooling fan is not working. (2104 Views) My Engine Goes Off When A/C Is Switched On / Help 2004 Acura MDX Overheats When The A.C Is Turned ON / My Toyota Corolla Over Heats Only When The AC Is On! Turn On The Heater. I turned on the heater, took a break, and finished the trip with windows open. Start by checking the radiator fans #1 cause of AC blows warm at idle Radiator or condenser fans aren't running or aren't. Does A Car Consume More Fuel When The AC Is On HI Than On LO / Car Overheats In Traffic / Radiator Fan Only Works When AC Is Switched On (1) ( Reply ) ( Go Down ) My Car Overheats When Ac Is On by Ericomoto ( m ): 12:31pm On Apr 22 , 2010 The condenser is mounted in front of the radiator and is cooled by the same air flowing through the radiator. Driving on the highway with the AC on the car stays cool. Idling with the ac on usually causes the engine to automatically kick up the idle speed a few hundred rpm's to run the compressor. There is lots of rust in radiator. If this is the problem you are experiencing, then the AC system is faulty, and the AC compressor is the main reason for this change. I have an issue with my Focus overheating, only when the AC is on. Why is it that my car overheats only with the ac on? if its the second option - you need to see a mechanic. 406 ci LS3 with ported 243 heads and Fast 92. Typically the radiator fan also is electronically controlled to run continuously with the ac on, and the car idling or slow speed. Check the coolant level and if its low, then add some and see if that helps. Car started to overheat with AC on, does fine on the highway but in stop and go traffic starts to overheat. The car has only one fan for both AC and engine with two speeds. The car had almost the entire cooling system overhauled recently. The temps drop back to normal when the car is moving. or very hot, so steam started coming out from under the hood? and it stayed right at the 'R' range. Then the weather turned cooler and it didn’t happen again. Water pump spins with … A problematic AC system can put a severe load on the engine, and lead to other issues - especially on a 23 year old car. Can anyone test this out for me. My cavalier overheats when the ac is on and when it is in idle. Car only overheats when AC on? I am tired of chasing this problem down and like the title says my car only overheats when the A/C is on. Your saying your car starts to smoke and overheat? The cooling fan should turn on somewhere between 185 - 200 degrees. Hope this helps Hello Car Talk Nation, Here’s my problem. Nairaland Forum / Nairaland / General / Car Talk / Why Does My Car Overheats When AC Is Switched On? Cars Basics Buying & Selling How Tos Reviews ... That seems to be enough to run the car back to wherever I need to be. Here are the 5 steps you should take if your car overheats: 1. Car overheats only on highway. However, when I rev. It's a system of fins situated behind your car's front grille. Temp gauge had needle pointing in the middle (I know it's not true temp gauge) Temp gauge started to climb. The only time it ever overheats is when the AC is on only. So replaced condenser and still having same issue. 1996 - 2004 SN95 Mustang -General/Talk-SN95 4.6L Mustang Tech . We use cookies to give you the best possible experience on our website. When I turn the AC on the radiator fan turns on. It sounds counterintuitive, but Reina recommends turning on the heater. I have a 2006 Chevy Colorado, 5 cylinder, automatic, 4wheel drive with 62,700mi. Compresser spins with some resistance after taking belt off. The AC compressor connects … I would appreciate any help with this problem the problem is that it overheats only when its a hot day and I am stuck in traffic and and the AC is on. The temp also drops back to normal if I just rev the engine in park to 1500 rpm. Right at the ' R ' range key component of your car engine... Test drive temp also car overheats with ac on only back to normal temp fairly quickly is Switched on somewhere between 185 - 200.... / nairaland / General / car Talk / why does my car overheats when AC off! Fan also is electronically controlled to run continuously with the radiator and is cooled by the same saying your 's. 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