My air conditioning blows cool sometimes and other times it doesn't what can cause this to happen? It doesnt stop blowing it just blows hot air. I have already had it charged. It's a 2005 Chevy Equinox.

Sounds like the blower motor is going bad

have you had the instrument cluster programmed, if not this might be your answer. i work for iveco and e
we have to programme new instrument clusters, if it was a second hand one this also might cause the problems

could be low on coolant..in AC system..

Air pockets will make the guage do that, and also cause your heat to come and go. Also, a poor radiator, as in rotting, or plugged up, will cause high temperature issues.

First things first.....You must have the air conditioning system hooked up to an a/c system machine and then checked for leaks and also read low and high side pressures. If there are leaks then low Freon (R134a) content and low refrigerant oil can cause the a/c system to not engage the a/c compressor which basically means you will not have proper defrost functionality nor regular air conditioning. Most shops, when working with your air conditioning, will install air conditioning dye to assist them in locating leaks and is the first step in diagnosing all a/c systems. Post the findings after thw

It sounds like the dual climate control valve. It is supposed to close the valves when the a/c is turned on, but they get stuck sometimes. I have already replaced 2.

What happens is the valves get stuck and the engine heat will blow over the cool air making it feel warm, even though the a/c is working fine.

If it started out on one side of the car cooling better than the other than you can almost bet this is the problem.

They will be called a heater control valve by most auto parts stores. I think the part is Motorcraft YG378.

Another way to make sure this is the problem is to find the dccv and clamp the two top black hoses with pliers or something and see if the car gets cooler. It will still not get cold but this will let you know if the dccv is the problem.

the air conditioning system has most likely drawn moisture this is not good take it to have the system recovered and a new restrictor valve put in. leak checked and recharged

Sounds like your freon has leaked out and your heater blower resistor is burned out. Deffinitly take this to the dealer.

Hi, my best advise is to have your air check for freon leaks ,low freon causes the compresor cluth to stop working ,this can cause the air to blow hot .......

The blowing of air into the coolant resevour is caused by a leaking head gasket. What's happening is the cylinder is blowing air into the cooling system causing this to happen.