Intermittent A/C operation

jeannie63

starts off great, but if i stop anywhere and shut the car off, upon startting again, the a/c doesn't blow cold. it BLOWS, but not cold air. after running for about 25-30 min, it will again start cooling off. I live in Florida, so that 25-30 minutes is BRUTAL! any advise???

Mr_Shiftright

This could be due to a number of problems, so really the best approach is to have it checked out.

Sometimes, if there is too much air or moisture in the system (due perhaps to a leak, or faulty recharging recently), the AC will actually freeze, blocking various passageways. So you start off cold, then it blows warm, and maybe after a while engine heat will defrost it.

It could also be caused by low level of refrigerant, which will cut off the AC compressor

There also may be a problem with the control module, which needs a scan tool to read the diagnostic codes that might be stored in there.