[pushkin]

I'm new here. So this is the problem. the ac blows hot air and ac light flashes after about 8 seconds. took to repair and so far have had compressor replaced system checked for leaks there are none, had freon replaced, tested mag relay by swaping with horn relay, horn works fine but ac still not working. been told it is some kind of computer problem but dont understand how to fix moved to florida dont have mechanic here and want to know something before bringing it in again.
Thanks for any help

 

[fishexpo101]

Could be a number of things causing this. Sounds like the shop is confused/lost on trying to diagnose this. This is a bad sign for the shop - try some place else - otherwise they will just continue to swap parts at your expense.

Most common cause for the blinking A/C and no cool air is electrical. A bad magnetic clutch relay is one of the most likely candidates. Swapping with another relay was a good idea, but they really should inspect the original relay/test it. Could also be mechanical - bad expansion valve, faulty compressor, incorrect refrigerant/wrong charge/wrong oil or additives. Other things include the A/C speed sensor (detects variances between the compressor and engine speed), A/C amplifier inside the cabin, bad cell in battery, etc.

When they changed the compressor - was the compressor really dead? By swapping parts, but not diagnosing it properly, they've just made future diagnostics much harder. As it is possible that the replacement compressor is faulty.