car ac blowing hot air when idle

Ford Taurus 2002 My cars AC blows hot. My cars AC blows cold when I start it after the cars been sitting off for a while.

How To Fix Car Ac That Blows Hot Air Ac Compressor Ac Compressor Air Ac Car

When it is at idle does the cooling fan work at high speed.

. If I am at a traffic light I can put the van in neutral and press the gas and it will start blowing cold again. 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. 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.

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. Three Signs your AC is Malfunctioning. Mine was 32 psi stock setup for R12.

Since the AC compressor is driven by the engine it doesnt pump as much refrigerant when youre at a stop or driving slowly. I have a 2002 Ford Windstar and the AC has started blowing hot when i idle but it blows cold when I am driving. Thankfully in this guide we will review each of these car AC problems in detail.

After a minute or so the low side will stabilize at the POA setting. Find a Shop. There are several ways debris can get into your cars air conditioning system to.

According to air conditioning expert of the society of automotive engineers SAE Ward Atkinson says the AC system is not fully airtight It is nearly airtight. 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.

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. Get your system refrigerant level. 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.

So check the Freon level in the first place. Suggest you hook up a AC manifold gauge set and see exactly what the system is doing. I would clean the fins of the radiator and condenser as the lack of airflow will cause the AC to be warm at idle.

A refrigerant leak is unique in the sense that refrigerant evaporates instantly into a gas once it isnt under the pressure of your closed loop AC system. 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. If your car has a cabin air filter and you think you might have an evaporator freeze up problem start by checking the condition of your cabin air filter.

Refilling the Freon in your car ac system can be the solution for car air conditioners blowing hot air when idle. The quick way to check the POA setting is to run the AC at idle unplug the blower fan and look at the low side pressure. Based on your description it is possible that a faulty condenser fan is causing the air to blow warm at idle and could also explain why the vehicle starts to overheat.

When the pressure is high like that on the low side your compressor is likely not engaged. It is easy to adjust but you have to waste your refrig charge when you open the system. Your AC system is low on refrigerant.

Here is a guide that will help with this. The biggest reason for car AC blows warm air while idlling is low on refrigerant. Any time you lose refrigerant from your cars AC system that leak allows air and moisture to enter.

Well have the system pressure tested if youre low on refrigerant it can do just that pray its that easy of a fix. AC systems are sealed and therefore dont require refrigerant top-offs. I had the compressor replaced back in February and the pressure is normal so it doesnt look like it has a system leak.

The Best in Auto Repair. It is also possible that there is a problem with the AC compressor. My cars AC blows hot.

Below you will find the chart that will help with pressures. As soon as I start driving it starts blowing room temp air. June 13 2017 at 136 am 881347.

Eddo June 28 2019 852pm 2. AC not blowing cold air warm air on the drivers side. When youre driving the fan is cooling the refrigerant inside the condenser and at idle it isnt getting sufficient airflow for cooling.

Vent doors not operating correctly. First the freon is low or you have a restriction in the system that requires the air blowing across the condenser to get the AC to blow cold. Refrigerants always trying to.

This issue is one of two reasons. Asked by Visitor in Savannah GA on. Usually such a condition begins with a decreased cooling performance only when idling but later turns into a more noticeable and serious problem where the AC stops cooling completely and even starts to spit out hot gusts of air.

AC stops cooling and blows warm air when the vehicle is idling for an extended period of time such as sitting in traffic. My cars AC blows. Other possibilities include a faulty compressor broken cooling fans or an issue in your electrical system.

Roy To prevent silicone fluid from draining into fan drive bearing do not store or place drive unit on bench with rear of shaft pointing downward. Moisture in the AC system can also cause an AC blows cold then warm condition. Since I just spent 1300 a few.

2 cause of AC blows warm at idle. An AC that malfunctions can show the first signs of error when it is restricted in power. Inadequate airflow over the condenser may cause this condition.

So even if he thinks the pressures are okay we need to check them. Have you checked the mixing motor and the doorpull out the glove box you will see a white motor remove it 516 or 8mm plug it back in run the system to see if the shaft on the motor works then check where the shaft fits in the top of the door if its broke cut the box under the door w a dremal.

Signs Of A Failing Air Conditioning Compressor