air conditioner only works when driving

There are many reasons why you might find the AC only works when driving but doesnt blow cold air during idle. It only works if temp outside is not hot or when i drive it on the freeway.

Is Your Car A C Is Not Blowing Cold Air 8 Causes And Cost To Fix

But at idle and in city traffic the radiator fan provides the air movement.

. 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. Some vehicles will use a separate radiator and condenser fan. At stop lights it would still blow warm air.

MY 1999 suburban has had issues with the air conditionervent system since we bought it used last year. Replaced the AC compressor. Read on to learn the most common reasons as well as how to fix the problem in each case.

When Im driving around it works great but when you stop and are idle the AC kicks on and off more off then on and it gets hot. Many cars are equipped with two radiator fans while others have. It remains cold when idling until I accelerate at which time it gets warm within a few minutes.

A malfunctioning vacuum-operated blend door will move in one direction when theres high vacuum idling and in the other direction at low vacuum driving which would result in exactly the situation you describe. Some vehicles may have a belt driven fan that relies on. If the high side is only 175 psi and the low side is 30 you do not have enough refrigerant in the system.

AC Blows Cold Air Only When Driving 30 MPH or Faster. Jun 24 2007. I checked the Freon and the shop had overcharged the system.

I have a 2007 Honda Pilot and recently the air conditioner AC began switching between cold and warm even when the controls are set to full cold. Do not just add some in need to be recovered sucked down to a deep overnight vacuum and recharged with the proper equipment not just a can hooked to a gauge set. Higher rpm causes the clutch to engage thus pumping refrigerant and delivering cool air.

When driving for a few minutes it turns to warm. The fans have two modes a slow and fast one. Not saying it isnt the pump but mess with the fan first bc switching the pump means.

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. AC is cold only when the engine is revving above certain rpm. Sometimes it would just stop blowing cold air.

If your car AC blows cold air when driving at highway speeds but turns warm at stop lights or when driving at slow speeds you may have a bad radiator fan or radiator fan relay. When you are moving the air is flowing through the condenser coils which is what cools the air. Driving down the road at 50 mph provides that good airflow.

When I get to a stoplight it gets cold again. The fast mode is when both fans are running and you can actially hear them running from outside of the car. The air conditioning compressor will turn off at the slightest rise of heat due to excessive HEAD PRESSURE - however the engine will not show any signs of overheating.

The AC on my 2008 20 L turbo now only works when I am driving at speeds of at least 30 MPH. Once we got moving again it would blow cool air again after a couple minutes. When I had my truck studded the ac wasnt always cold.

I need help finding why my cars air conditioning 2011 Ford Mustang v6 is only blowing cold air at idling and not while driving on the highway when its 100F here in Nashville. In the mornings while driving to work it blows cold air since its maybe 78 outside but once I get off work its 100F and it wont blow cold air. If i hit the streets with a temp of 80outside the ac will startblowing warm air and after a.

Any help is appreciated and. When we turn the vent on it only blows out air when its on high in front-the rear vents work f. You need air moving overthrough the condenser whether its from the fan or from driving.

It worked better after that but it still wasnt 100. To maintain good airflow when the car is in stop and go traffic or is completely stopped condenser fans will come on automatically. May 9 2011 3 Driving also cools down the condenser so it might be the condenser fan isnt turning on.

If not it could just be a bad relay so test that first 5-10 if its not the relay its probably the fan itself 50-80. Anytime the AC is on the fans should be running. If Freon charge is good and fan working properly then we need to go a bit deeper.

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. 99 of the time this problem is caused by insufficient air flow into the engine bay while vehicle is in slow moving traffic or at stop with engine and ac on. When at a stop the air is warmbut if I put it into neutral and rev the engine to lets say 2000 rpm AC gets colderor when Im driving obviously.

For 160 and some pocket change they evacuated the system to get out all the air and water and refilled it with refrigerant oil and a dye to help find future leaks. This door directs incoming air through either the AC evaporator or the heater core or a blend depending on the desired temperature. Car air conditioner not blowing cold air when idling is a pretty common issue related to your vehicles AC unit.

Freon levels are fine so I was thinking of a it being some sort of switch issue. AC Works only when engine is revving high. Id bet your condenser fan is kaput and the high speed air when youre driving fast is doing the job it should.

I know everyone is gonna say something about the. Just turn on the car and ac and look to see if its spinning. Ac was working rigth till 2 weeks agosuddenly ac just blows cold air to passenger vents only driver gets hot airand with heater on passenger gets hot air and driver only cold sometimes works normalbut must of the times dont.

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