my ac only works when driving

You need to take it to an AC shop so they can check and see if the expansion valve is working properly. Ac only works when driving.

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First the air flows will be available by compressing the refrigerant inside the cars air conditioning unit.

. Never saw over 900rpms on the fan. Inside this unit impurities and moisture molecules will be completely removed ready to flow into the throttle or orifice. AC Blows Cold Air Only When Driving 30 MPH or Faster.

My ac use to work while I was just sitting in traffic and it was blowing around 45F at the middle vent at fan on the lowest setting. When idling it just blows air the same temp as outside and with it getting hotter out thats misery. Finally they are depressurized to lower the.

The cabin air filter is located behind the glove box for. To check if your compressor clutch works turn the AC to MAX and start the engine. It needs to reduce the temperature so the refrigerant can condense properly.

Why AC Only Works When Accelerating. 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 in speed as the vehicle accelerates. The airflow from driving helps keep the fan working so when your car stops so do the fan and your AC.

One is that your condenser fan s is either not working or is worn out to the point that it cant spin sufficiently fast to bring enough air through the condenser. Joined Jun 13 2017 9 Posts. At idle with ac off it seems to stay in the mid to low 300 range usually.

June 13 2017 at 136 am 881347. Your cars AC condenser keeps your air conditioner cool. 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.

This is especially true when your car is stopped. Why does my AC stop blowing cold air when I accelerate. According to data by HomeGuide the average cost to replace a home air conditioner compressor is about 600 to 1200 under warranty or 1300 to 2500 when its not under warranty.

Driving with ac fan speed would hardly change just hold in the upper range of 380-500 sometimes higher. -I have no overheating issues at all. If this fan isnt working your AC wont be able to regulate the temperature inside your car.

There can be two possible reasons why your AC is only blowing cold air at high speeds. If the AC in a car only works when driving it could be due to a problem with the condenser fan. Get a thermometer that goes in your vent to see if its hot as you think it is or not from Amazon HERE.

VOLVO-V70 March 30 2019 128am 11. Loud noises when the AC switches on also indicate a bad compressor. BigJOE671 on Thu June 16 2011 1040 AM.

Ian you are 8 years too late and I would hope they have fixed the problem or replaced the vehicle. The clutch and the pulley will spin both at the same time. This part is responsible for transferring the heat coming from the system and dispelling it into the atmosphere.

When you are driving your engine is running at a higher speed typically 1500 to 2500 rpm so the compressor turns faster and you have more AC cooling. I didnt know how long its been on that car so I bought a new one at autozone. If thats not the issue then your coils on your condenser is stopped up not allowing it to cool the air.

Aannesley June 24 2009 951pm 4. At idle with ac fan speed is anywhere from 380-500rpm usually on the lower end. The AC on my 2008 20 L turbo now only works when I am driving at speeds of at least 30 MPH.

Many HVAC contractors charge 100 to 150 per hour plus the cost of parts to repair a home AC compressor. Air condition systems only need around 6 lb of pressure to operate. Vent doors not operating correctly.

My AC only blows cold air when Im actually driving. Up to 8 cash back When your car is moving say at 45 MPH there is lots of air flow over the condenser the condenser is the heat exchanger in front of the radiator and that airflow is essential to proper ac system operation. At idle parked or stopped at a light most cars run around 700 to 900 rpm so the AC compressor is moving slower and will not perform as well.

Discussion Starter 1 May 14. If its not getting power check the relay and fuse. Jump to Latest Follow 1 - 15 of 15 Posts.

These are some of the major causes of why AC only works when accelerating-1. After that this gas will continue to flow through the condenser and turn into a liquid with high pressure. Basically the AC high pressure hose is kind of like a turbo for your AC - it supplies more pressure when youre idling and less pressure when the AC motor is.

Lamentably not every person who claims their vehicle knows their motor. I didnt use the drier from the scrap yard. In case only the pulley rotates check the clutch connector for power.

AC only works when driving. Fortunately replacing a cabin air filter can be done quickly with only a screwdriver. On the off chance that your AC possibly works when you are driving your motor is likely overheating.

To maintain good airflow when the car is in stop and go traffic or is completely stopped condenser fans will come on automatically. It is easy enough to check to see if the fans are working or not. If this valve fails to go the proper position for refrigerant line temperature it doesnt convert the refrigerant into a gas but instead it remains a liquid and the cooling effect stops.

Suggest you hook up a AC manifold gauge set and see exactly what the system is doing.

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