ac only works when driving fast

Only one fan on the car. This is a new problem.

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If the car is standing still on the parking lot heater blows cold air.

. Hi Guys - My air conditioner is giving me problems. I brought it in to get serviced and I was told that my wires were melted and thats why it stopped working so I had them replaced and after the ac was Back to normal for 2 weeks. As soon as you slow down the ac goes out.

My air conditioning in my 2012 Kia Optima EX GDI non turbo runs fine while driving at higher speeds but at a stop light stuck in traffic at low speeds it only blows warm or hot air. 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. The AC has worked like a champ for the past year since I.

Ive tried putting it in neutral and revving the engine while waiting to move again but this does not seem to make a difference. AC Blows Cold Air Only When Driving 30 MPH or Faster. 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.

Get a thermometer that goes in your vent to see if its hot as you think it is or not from Amazon HERE. When you are moving the air is flowing through the condenser coils which is what cools the air. If i am revving the engine from 1000 to 2000 and back or accelerating the heater starts working.

Up to 8 cash back My ac hasnt worked for over a year Now. It sounds like the air compressor or condenser are on the same belt as the main pulley. System to provide cool air out the vents it must be abl.

There are several reasons why a cars AC Air Conditioning may not cool when at a stop and blows cool only when moving. What could be the problem. The most common reason is the cooling fan for the condenser is not working.

If higher vehicle speed improves AC. When driving heating works-ish. The AC on my 2008 20 L turbo now only works when I am driving at speeds of at least 30 MPH.

Please what do I do. I checked the water pump. Now unless I have it only on a low setting and driving at 45mph is the only time it BARLEY blows out cold air.

Mostly when the car is moving. Anytime the AC is on the fans should be running. The AC blows hard all the time but when you are sitting at idle at a redlight or something it goes from cold to lukewarm.

Answer 1 of 17. Up to 20 cash back Ac on auto only works when you drive fast. Normally car AC systems are built so that the higher the engine speed RPM the faster the AC compressor turns.

Your air conditioner may be working but not at its intended power efficiency. Any ideas what it could be. Hi First check in front of the radiator to make sure dirt or.

There is a rattling noise coming from under the hood it sounds like metal shaking around. In order for ANY AC. For some reason when I drive around town taking short trips my AC refuses to cool the car down.

Tried to accelerate and it sputtered and died. It may come back but only when you -. The fast mode is when both fans are running and you can actially hear them running from outside of the car.

And noticed that the second fan on the radiator never came on although i. As soon as you get moving it gets cold again. I popped the hood and noticed that when the AC compressor kicks on that it almost stalls the engine.

Car Car AC only cold at high speeds but not low on coolant. This could mean that there is some slipping on the belt and when you accelerate it activates something called a tensioner which helps keep the belt taut thus making the car blow cold air. I am no expert in more recent vehicles but if the ac works only at higher driving speeds it could be because the ac condenser that is located in front of the vehicle near the radiator gets more air flow that helps it eliminate better the heat heat is extracted from the refrigerant when its compressed to be cooled down.

2005 Dodge Ram 1500 SLT Big Horn 58L V8 Hemi my air conditioning only works when Im driving forward and does not work at all any more when Im sitting still at an idle. The AC blows cold on weather 80 or below but anything above that temp only hot Air. But there is a much more likely culprit.

So more power applied to the engine means more power applied to. You may have experienced this in other. The car is heating only when i am accelerating.

Rael July 6 2008 826pm 1. Performance open the hood at idle and verify that the radiator fan is running and if it is will it firmly pull a sheet of paper to the front of the condenser. The fan is still blowing when I am at a stoplight or in a drive-thru it just blows hot air.

The ac works only when the car is accelerating. The fans have two modes a slow and fast one. For the AC to work there has to be a change of state from gas to a liquid in the condenser in front of the radiator To get this change of state there has to be air flow across the condenser.

It looks normal nothing broken or weird about it. Its important to know that many times the cooling fan is shared by the radiator and condenser other times there are TWO separate ones. My AC works only when I am driving at fast speeds.

I stopped at a stop.

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