ac only works when driving slow

From what I have been told there is a valve in the AC that is not replaceable but there is a company that DOES have parts for the compressor. Car air conditioner not blowing cold air when idling is a pretty common issue related to your vehicles AC unit.

Air Conditioner Only Works When Driving What Could Be Wrong

It is easy to adjust but you have to waste your refrig charge when you open the system.

. My one issue is the AC doesnt work when the truck is idling. This can be caused from a slipping belt bad compressor clutch or even the cycling switch not allowing signal to activate the compressor. To maintain airflow when the car is in stop and go traffic or is completely stopped condenser fans will come on automatically.

A small refrigerant leak is the most common reason a cars AC gradually loses its cool. Dirty cooling fins faulty fan clutch or malfunctioning sensor could cause this. 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. Get a thermometer that goes in your vent to see if its hot as you think it is or not from Amazon HERE. 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.

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. Many cars are equipped with two radiator fans while others have one. Read on to learn the most common reasons as well as how to fix the problem in each case.

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. There are many reasons why you might find the AC only works when driving but doesnt blow cold air during idle. Why does my AC only work when its cold.

Most likely problem is with fan system not operating properly to move air through condenser while stopped or moving slow. Up to 8 cash back When the car is moving versus stopped there is more air flow over the condenser the heat exchanger in front of the radiator and that airflow is essential to system operation. It needs to reduce the temperature so the refrigerant can condense properly.

It could be a low charge of R-134a also. Sounds like either youre low on freon or your condenser fans are not kicking on. As soon as you slow down the ac goes out.

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. If the AC in a car only works when driving it could be due to a problem with the condenser fan. AC works on highway only.

Air condition systems only need around 6 lb of pressure to operate. 4 Jul 27 2016. Answer 1 of 6.

I would say in 90 of all cases where I tried to turn offon the AC the AC does not blow cold air. Could also be a bad compressor or one on its way out. VOLVO-V70 March 30 2019 128am 11.

This part is responsible for transferring the heat coming from the system and dispelling it into the atmosphere. My 2010 E350 AC works fine and blows cold air almost instantly when the car is parked in the shade. Answer 1 of 8.

Rael July 6 2008 826pm 1. After a minute or so the low side will stabilize at the POA setting. Car Car AC only cold at high speeds but not low on coolant.

This can be a few things. -listen to hear if your radiator fans are running. 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.

Mine was 32 psi stock setup for R12. If thats not the issue then your coils on your condenser is stopped up not allowing it to cool the air. Does this indefinitely making the truck sound like its idling funny.

Anyway I think the fuse is a 40amp maxi-fuse. When Im idling with AC on I can hear the AC compressor kicking on for under 3 seconds. Up to 20 cash back proautotech.

Driving down the road it works and gets nice and cold. -set climate to auto and temp to Lo. 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.

I have taken it to a shop. Then it kicks off for about 2 second. It may come back but only when you -.

Yes it does to a 5 level drop in your acceleration and your top speed may decrease not drastically mileage obviously drops The alternator powers your Ac fans And the pump is only switched on when the engine is running there. You need to verify the compressor is coming on when the AC is not working. -key to ON position engine off.

Mine is that the AC only works on cool days and when the outside temp is 75 the AC blow hot air. The AC on my 2008 20 L turbo now only works when I am driving at speeds of at least 30 MPH. 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.

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. Another possibility is charge in system is low affecting its efficiency. A leak in your AC system could be causing the unit to blow warm air since there isnt enough refrigerant in the system to cool things down.

But there is a much more likely culprit. If your HVAC works the same as an 04 try this. Sounds like you may be having a similar issue as me.

Although at some point the compressor wont engage if there isnt sufficient refrigerant in the system. Ian you are 8 years too late and I would hope they have fixed the problem or replaced the vehicle. AC Blows Cold Air Only When Driving 30 MPH or Faster.

But if the car is parked in an unshaded area under the hot sun the AC keeps on blowing hot air. Only one fan on the car. Joined Jul 17 2016.

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