car air conditioner blowing hot air when idle
The compressor can pump the Freon more easily when the car is running at a high speed on the highway but it struggles when the car sits idle. Now this afternoon the temp is back to 90 and pressure is reading 120 and blowing hot at idle again until rpms are increased then pressure is going down to around 40 and starts blowing cold again.
1 Answer Car blows warm air when idling Blows cold air when traveling blows warm air when sitting Posted by Howard on Jun 09 2012 1 Answer Anonymous Contributor 12 Answers It sounds like your AC unit could be overheating or even damaged.
. If your car ac pauses the flow of air when idling but turns back on when you begin to move the first place you should turn your eyes is the motor fans. More often than not when a car is blowing hot air only at a stop the problem is with the electric cooling fans. Faulty AC Control Switch 10.
This could be something as simple as a blown fuse a bad relay a broken wire or even low output from your alternator. Heres how to nail down the cause. My car has gone around 130000 miles.
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If it has been a while since you cleaned and replaced the filters it may be the cause of your air conditioner blowing hot air. If your car AC blows cold then warm the cause can be a low system charge moisture in the system a malfunctioning expansion valve clogged evaporator fins or an overcharge condition. During idling however the AC starts blowing warm air and it gets warmer and warmer the longer the car is.
Up to 8 cash back Q. Lack of cooling means the refrigerant cant condense and turn back into a high pressure liquid. Other possibilities include a faulty compressor broken cooling fans or an issue in your electrical system.
AC stops cooling and blows warm air when the vehicle is idling for an extended period of time such as sitting in traffic. If the heater has a tap for supplying coolant to the radiator. Defective Compressor Clutch 5.
You can do the refill yourself if you know the procedure. Signs of a Temperature Problem in Your Car AC Blows Cold Air One Side and Hot Air on the Other. Low car AC charge causes evaporator freeze up and low airflow.
AC blows warm while idling cools during driving. This problem is a known issue See Bulletin No. It compresses the refrigerant.
In most cases its due to a loss of refrigerant in the system. Blocked Expansion ValveOrifice Tube 4. Broken or Blocked Condenser Car Broken or Blocked Condenser A car air conditioning condenser is a heat exchanger.
AC units have a sensor that will turn them off automatically to prevent damage from overheating. There are a few different reasons why the AC might not work in your carIf the air conditioning in your car is blowing hot air on one side and cold air on the other there could be a simple fix like adjusting the temperature or it could be time to replace a part like the. It can be difficult to diagnose electrical problems so you might need a good mechanic to help you track down this problem.
Your car AC relies heavily on the motor fans to circulate the flow of freon when the car is at rest. If you dont see or hear these fans try checking electrical connections fuses and relays. The coolant supply is blocked.
When its level goes lower than the acceptable level you will face the issue of car air conditioner not blowing cold air when idling. The most common cause of an AC system blowing warm air is a lack of refrigerant though you may also have a problem with your condenser. 6 Common Causes Of Air Conditioner Blowing Hot Air 1 Low Refrigerant Levels Are The Cause Of AC Blowing Warm Air 2 Faulty Compressor Leading To AC Blowing Hot Air 3 Clogged Filters Not Dirty Can Cause AC To Start Blowing Warm Air 4 Clogged Expansion Valve Causes Hot Air Coming From AC 5 Power Issues.
Blown Fuses And Tripped Amp Breakers. Those fans should kick on when you turn your air conditioning on to keep enough air moving through the condenser while youre stopped. A Corroded Relay 9.
Eddo June 28 2019 852pm 2 when the pressure is high like that on the low side your compressor is likely not engaged. To avoid this issue in the future replace your units filters once a month. Broken or Blocked Condenser Overheated Engine Lack of Refrigerants Debris Bad Condenser Fan Faulty Condenser Parts 1.
Blocked Drain Pipe 3. Moisture In The AC System 2. While running the AC is blowing cool but if idle after about 15mins it start to blow hot airI checked the condenser fan and its not turning.
Car Air Conditioner Blows Cold Then Warm 1. Cause Inadequate airflow over the condenser may cause this condition. What happens is this.
The issue is related to the AC which works partially normal. Refrigerant thats in a liquid state makes its way to the evaporator where it boils as warm air from the cabin flows across it. Slow Blower Fan Speed 11.
Therefore electrical issues can cause your car air conditioner to stop blowing cool air. But everytime I switch off and on the engine and on the AC tooAC okay again and the fan is turning. Radiator or condenser fans that arent running or arent running the proper speed can cause an AC blows warm at idle condition If your radiator fans arent working or arent working at the proper speed the condenser cant properly cool the refrigerant.
Here are some reasons why car AC not blowing cold air when idle. Thankfully in this guide we will review each of these car AC problems in detail. Car_ac_blowing_hot_airjpg By dnberty Licensed by Getty Images Original Link.
Bad or Failing Fan Clutch This is another reason for a car AC not blowing cold when idling. While I drive and the engine revs up from 1700-2200 RPM the AC works well. A properly maintained and well looked after air conditioning unit has a greater chance of working efficiently.
Your car AC is actually a heat exchanger that recirculates warm air from inside the cabin and replaces it with cold air. Air in the cooling system impedes the circulation of coolant in the system and as a result the heater blows hot air only when driving and cold air at idle.
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