my ac only works when driving

Low engine coolant andor low refrigerant. To check if your compressor clutch works turn the AC to MAX and start the engine.

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Your cars AC condenser keeps your air conditioner cool.

. The clutch and the pulley will spin both at the same time. AC condenser fan. When your going down the.

At idle with ac fan speed is anywhere from 380-500rpm usually on the lower end. Reasons Why AC Only Works When Driving. At idle with ac off it seems to stay in the mid to low 300.

Up to 8 cash back The high pressure hose is designed to increase and decrease AC pressure during different driving conditions since the AC drive belt will increase. The AC on my 2008 20 L turbo now only works when I am driving at speeds of at least 30 MPH. Hydraulic problems under the hood.

If the AC in a car only works when driving it could be due to a problem with the condenser fan. Fortunately replacing a cabin air filter can be done. A condenser a tiny heat exchanger is used in all vehicle air conditioning systems and it is.

You may have a fan malfunctioning. Air condition systems only need around 6 lb of pressure to operate. Answer 1 of 12.

As soon as you get moving it gets cold again. The AC works best when the roadspeed is above about 25 and engine speed is above 1500 rpm. AC Blows Cold Air Only When Driving 30 MPH or Faster.

Id bet your condenser fan is kaput and the high speed air when youre driving fast is doing the job it should. This part is responsible for transferring the heat coming from the system and. This is another reason for a car AC not blowing cold when idling.

The ac needs air constantly flowing across the condenser-this is the thing in front of your radiator that looks like a radiator. Just turn on the car and ac and look to see if its. Never saw over 900rpms on the fan.

Vent doors not operating correctly. If thats not the issue then your coils on your condenser is stopped up not allowing it to cool the air. It got cool after about 2 mins of cruising at 50-60mph 3000rpm and vent temp would be around 55-60F at 85 Ambient.

If your car ac pauses the flow of air when idling but turns back on when you begin. If this fan isnt working your AC wont be able to regulate the temperature inside your car. In case only the pulley rotates check.

About Air Conditioning System. When youre sitting in traffic the heat builds up under the hood and its harder. Bad or Failing Fan Clutch.

Next day the car only started to only get cool when driving. AC only works while driving 1. Suggest you hook up a AC manifold gauge.

Clogged or dirty cabin air filters and fan housing will cause the AC to work harder making it sometimes work while other times it wont. The AC blows hard all the time but when you are sitting at idle at a redlight or something it goes from cold to lukewarm. When driving at slower speeds or idling.

Electric problems under the hood.

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