car ac blowing hot air when idle

It is also possible that there is a problem with the AC compressor. HEATER BLOWS HOT AT IDLE COLD WHEN DRIVING DEMONSTRATED ON DODGEIf you have a car that blow warm hot air at idle but when you start driving down the highway.

6 Reasons Why Car Ac Not Blowing Cold Air When Idle

Your car AC relies heavily on the motor fans to circulate the flow of freon when the car is at rest.

. With the engine idling at normal operating temperature set the temperature control knob in the full hot position the mode control switch knob in the floor. Not quite correct slot a 2005 will blow ice cold air at idle. 2002 Jeep Liberty.

Another common reason for car air conditioner not blowing cold air when idling is an overheated engine. What happens is this. AC blows with good gusto cold when vehicle is moving down the road.

Since the AC compressor is driven by the engine it doesnt pump as much refrigerant when youre at a stop or driving slowly. Most cars have two cooling fans one for the condenser and the other for the radiator. I show in this video what was causing the problem and how I fixed it on my 2005 Hyundai Santa Fe.

Most fans do not pull enough air at idle to cool air enough to keep your car cool as it did when we used Freon. If the expansion fails to close slightly when idling the pressure falls off at the evaporator and the AC stops cooling. Does not do it all the time a selinoid controls idle speed when ac is on or off.

The high pressure readings are only occuring when the outside temp is 90 or higher. Well have the system pressure tested if youre low on refrigerant it can do just that pray its that easy of a fix. When your car starts moving the airflow restores the cooling ability to your system.

The only time you can tell something is wrong if you stop and it starts to blow warm. Tester jeshestJuly 20 2012 1254am 4 The fans are working. Debris There are several ways debris can get into your cars air conditioning system to make it not blow cold air.

Up to 8 cash back The purpose of the high pressure hose is to increase and decrease AC pressure during different driving conditions. This problem is a known issue See Bulletin No. The fans could actually be broken like a burnt out motor bad mount a chipped fan blade or they could simply have an electrical problem like a blown fuse or burnt out relay.

I know the pressure changes with temperature change but Ive never seen this drastic of a change. Engine coolant is delivered to the heater core through two heater hoses. AC stops cooling and blows warm air when the vehicle is idling for an extended period of time such as sitting in traffic.

Thanks for listening gents. Inadequate airflow over the condenser may cause this condition. Now for the feeling of warm air at idle if your car has a sight glass on the receiver dryer assembly or the small AC hose.

Your car AC is actually a heat exchanger that recirculates warm air from inside the cabin and replaces it with cold air. When your car starts moving the airflow restores the cooling ability to your system. Refilling the Freon in your car ac system can be the solution for car air conditioners blowing hot air when idle.

Refrigerant thats in a liquid state makes its way to the evaporator where it boils as warm air from the cabin flows across it. Like having a blocked condenser having broken cooling fans can cause a lack of cooling at your condenser and could cause your car AC blowing hot air. Almost immediately at stopping at idle it begins to blow warmhotter air.

That being said he was way too busy at the time to dive into another project. Idle should increase when ac is turned on. 2 cause of AC blows warm at idle Your AC system is low on refrigerant.

My AC started blowing warm air when sitting idle. You have two hoses on your AC compressor one big and one small it is the small one that may have a sight glass on it. The engine temp is also normal.

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. So check the Freon level in the first place. If the system is low on refrigerant it will show up as AC blows warm at idle and blows colder when the engine is running at higher RPMs.

You may have trapped air in the cooling system or the heater core may be partially plugged up. Cooling fans not workingthe reason it dont run hot when youre going 55 or 65 mph is because enough air is flowing through because of speed to cool the systemthen in stop and goNOT enough time or air flowing throughfix the cooling fan problembefore you RUN IT TOO HOT AND DAMAGE THE ENGINEtemp sensoror air in the system. If the ac isnt blowing cold air when the car is idling this is an indication that there may be a problem with the AC system high pressure hose.

If anyone has a pretty good idea of what this is please let me know I would appreciate it. Now that the temperature is down in the mid 80s the pressure as went back down a bit and the AC is working better at idle. If the car is moving the air conditioning system will not require a secondary cooler.

In most cases its due to a loss of refrigerant in the system. The compressor of the AC system moves heat from the radiator to the condenser. On this car the compressor is functioning.

Airconditioning works fine while riding but at stop light the idle drops down and the air blows hot.

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