WHEN CAR IS AT IDLE IN LOCATION WHERE THERE IS NO AIR FLOW, TEMP GUAGE MOVES INTO RED WITH 2-3 MINS. AC QUIT WORKING LAST YEAR, NOW BOTH THE ENGINE FAN AND COOLING FAN WILL NOT WORK, WE HARD WIRED THE FANS AND THEY WILL WORK THAT WAY, FUSES ARE OK AND RELAYS ARE OK...LOOKING AT REPLACING THE TEMP SENSOR NOW...AM I HEADED IN THE RIGHT DIRECTION?
Definitely get the fan problem fixed. I had an older Saturn, and it would do that periodically. It turned out I had a bad battery terminal, it would short out from time to time, and if it did so while I was driving, the fan would cut out and therefore not cool the engine. While I was driving it was usually ok, because air could flow, but in traffic, or stopped, it would get pretty hot. I found that turning the heat on and letting it blow full blast would help it stay a little cooler, it'll just cook you inside the car.
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sensors......Water temp sensor, air flow temp sensor, MAP sensor, Idle speed control solenoid, throttle position sensor, O2 sensor.........
Engaging AC draws on power from your motor, resulting in the ECU having to compensate to keep revs stable. Increased revs result in increased air flow, water flow, fuel flow & exhaust emissions.
Check belts for your AC pump first, as the same belt may drive your water pump. If it slips under load when the AC is on, ..................... Say no more. Next replace Water temp sensor. No luck..... ISC solenoid....
Hi Reggie, I'm glad to help. TWO things I want you to check. ONE: You have changed out a lot of stuff, so you may have air trapped in the cooling system, you'll need to remove the radiator cap and let it run until your at operating temperture, while watching to make sure it doesn't overheat on your of-course. If after running the engine say 30 minutes and topping off the coolant if needed, it still runs hot. Move on to: TWO: If you have the electric fan, some do, some don't. If it is electric make sure the fan is coming on, if it doesn't come on then you have found your problem, replace the fan assembly. Hope this helps and have an awesome day Reggie!
Start by checking to make sure that the a/c condensor and radiator is not full off debris. If the condensor and radiator were full of debris it will limit the air flow from the engine cooling fan which in tern will cause a high discharge pressure on the discharge on the a/c causing poor or no cooling at idle and could also cause vehicle to overheat. Check and make sure that the cooling fan as well as the condensor fan are coming on together when the a/c is turned on if equipped with 2 fans.
It sounds like your AC unit could be overheating or even damaged.
AC units have a sensor that will turn them off automatically to prevent damage from overheating. If there is an insufficient amount of air flow, the unit will heat up, and then eventually turn off.
When the car is moving, more air is forced over the unit, likely keeping it cool enough to run, however, when the car come to a stop, it loses that air flow, and quickly heats up. Thus, the AC would work while the vehicle is in motion, and overheat and stop when the car is stopped and idling.
However, the AC unit could be completely blown. The cold air while moving could be just a case of air being forced into the car. Think of a house fan, the fast the wind blows on you, the cooler it gets.... Thus, it could be an illusion that the AC is working when car is in motion, when it really isn't.
verify the engine cooling fan runs at idle without the AC on, it should come on around just past 1/2 scale on the temp guage, do not let it overheat! these engines have aluminum cylinder heads and u can blow the head gasket out, let me know the results
The Temp gauge should read in the middle of the gauge at operating temperature. This is normal. The radiator fan should come on after idling (not driving) for 20 minutes. The fan should also come on when you turn on the AC. Are you experiencing overheat problems?
Please reply if you have overheating issues.
if ac dont work idleling it start to work when you move our fan is not coming on because when you activate the ac compressor kick in and fan should come on if it start to be cold only when you drive the force air cool the condensor ac work temp goes down HOPE IT HELP FIXYA OUR POST THANKS . PIERRE