Car Ac Not Cold When Idle

If the high side is really high at idle with a hot engine, then you need to check if the condensor fan is kicking on and running as well as check for simple compressor operation. 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.

Reasons Your Ac Wont Cool Ac Stopped Working Autobytelcom

When i drive the car, and get it moving 30 mph or so, the high side reading drops to under 100 psi, along with the loss of cool air.

Car ac not cold when idle. 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. R134a needs higher compression than r12 and it needs a lot of air going across the condenser to overcome the heat outside. The reason for a bad cooling fan affects the air conditioner so significantly is the fact that heat coming from freon (refrigerant) is usually cooled when it is passing from the condenser.

The ac compressor may not be pumping sufficiently at slower rpm's (revolutions per minute). At speed, you have a steady and strong airflow, which carries more heat away from the fins, giving you cooler air temps. In turn helping the ac get colder.

I think some of you are just experiencing normal activity. At idle, air is just not cold, once you start driving, it cools down. Get your system refrigerant level checked.

High side should be over 200psi and low side around 30ish psi. The only way your gonna know whats wrong is to take it to a shop and have them hook the machine up and see if the pressures are low or not. 4 reasons why the car ac not blowing cold air when idle

This is another reason for a car ac not blowing cold when idling. When you are stopped, the only airflow over the condenser fins is provided by the electric fans. A defective condenser fan the cooling fan in the condenser is the first thing that you should look into while finding out the reason for car air conditioner not blowing cold air when idling.if the fan is damaged or cannot run with its full force, it cannot cool down the heat coming from the freon (refrigerant) through the condenser.

Completing the coolant level with the same type of coolant represents an easy and quick fix. Mostly the compressor of the air conditioner transfer heat from the radiator to the condenser, if your car has become over heated and heat transfers alter efficiency, your car air conditioner will stop blowing cold air when it is idle. The most common reason for now blowing cold air is condenser, when it not working, your car will not blow cold air.

I have not had a chance to get pressure readings yet. My 2005 gmc sierra always used to blow ice cold, now it blows only slightly cool when driving and a little cooler when idle/not moving. I know ac performance is somewhat ambient temperature dependent, but if it is below 90 or cloudy/late in the day, the ac is at least 6 degrees colder on average and i'm quite comfortable in the car.

If it’s not cooling at idle, but cools when you accelerate or are driving at 1500 rpm engine speed or more, than that’s a pretty sure sign the system is low on refrigerant. #2 cause of ac blows warm at idle. You should check the system from time to time and keep an eye on some components that can cause the problem.

Why is air conditioning not as cold at idle. An overheated engine is another common reason for blowing not so cool air in idle conditions. Your car ac relies heavily on the motor fans to circulate the flow of freon when the car is at rest.

So when in idle your ac doesnt blow cold because it's in low pressure, and your crank is turning slower. Keeping this in consideration, why is my ac not cold when idling? What you can do is check whether the electric cooling fan that sits beside the condenser is running.

Poor maintenance is the main culprit for car ac not blowing cold air when idle. A low coolant level in the tank represents the main reason why you don’t have hot air in the cabin, it is not just related when the engine is idling, however, this can be the reason why your heater blows cold air at idle. Condensing fans are both blowing at low speed, it's about 80 degrees outside.

Bring the car to a stop, the high side goes up to 300 psi. Your ac system is low on refrigerant. My ac is only cold at idle or low rpms, when i rev engine up stops blowing cold but the compressor clutch never disengage , freon level is not low and a.

The high and low side gauge readings are normal, around 300/35 psi. And it is true you have a high and low pressure switch, and the adjust with vehicle rpm. I checked the pressures, they are good.

There are 4 reasons for this. If the internals is heated then no matter how good your car ac is, it is bound to malfunction. Since the ac compressor is driven by the engine, it doesn’t pump as much refrigerant when you’re at a stop or driving slowly.

I had that not so cool air when the car was sitting idle until i got to moving. If the car is moving, the air conditioning system will not require a secondary cooler. Check whether the electrical connections for the condenser fan is connected and seated firmly.

Discussion starter · #1 · oct 3, 2020. Heat transfer from the radiator to the condenser can alter efficiency, if the car is overheating. I can see the compressor spinning and it does not stop, so its not the compressor kicking on and off.

It also may be due to the thermal efficiency of the condensers. When i stop the car, and idle it, the cold air returns. It is common to observe loose ends of various.

I’ll assume that the heater control valve is fully shutoff (if not then that’s the 1st thing to fix).

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