AC blowing warm

I couldn't have picked a worse time to realize my air conditioning doesn't work, damn heat wave. Anyway, last summer my AC worked fine now there isn't even a hint of cool air.

When i push the AC button, the rpm's rise and i can hear a click from the compressor. I thought it might just need to be charged, but when i put the gauge on the low side the PSI was well above were it should have been.

I ran the AC at full blast and i didn't see any leaks. Also the two lines where you check the PSI when recharging it were both hot. The haynes manual said these were suppose to be cold.

Money is tight and i'd rather go through and figure it out myself; then have a mechanic charge me a bunch of money for something stupid.

Any ideas??

 

Bump

 

The "cold" line are suppose to be your suction line.
If they are hot, it could be either your cap tube/metering device isn't flashing the gas or your compressor isn't working correctly..

Your liquid like(discharge) is your high side..what's your high side pressure?


It can help alot in troubleshooting..I don't know everything about Automotive AC systems..but I work in the field for HVAC..so it's pretty much the same concept more or less..domestic refrigerators run off 134A and I have a lil experience with that.

 

Discharge is the output of the compressor. The liquid line is the line between the metering device and the evaporator. How long have you been doing HVAC?

The best thing to do is to compare your suction and discharge pressures. If they're similar while the compressor is running, it's a compressor valve issue and will need to be replaced. Thats most certainly what it sounds like.

 

Oops

Got me, wasn't paying attention on that..didn't even type 'line' correctly
and 2 years

 

get a 2nd gen and stfu

 

freon levels go get it refilled

 

fail. read the original post.


Adding refrigerant to the system when the suction pressure is too high and the compressor isn't pumping is a real genius move.

 

something you can try on the feebie tip is cleaning your fan blower righ underneath your glovebox. My AC was blowing "cool" air and after cleaning the fan grilles it is blowing "cold" air now. Worth a shot, and wont cost you a dime.

 

That wont help. Mine doesn't work for shit.

 

Anybody experienced a grinding noise coming from their compressor, it almost sounds like the compressor stops moving and the belt keeps spinning on the compressor itself. This happened to me last week and i turned the ac off immediately, i turned it on the other day and it worked just fine until the truck warmed up and then again i heard the grinding noise... anyone have ideas about this, can the clutch be replaced on the compressor or do you have to replace the whole damn thing, because everything else seems to be working fine except when i hear that awful noise......

and sorry for jackin your thread pal...

 

Haha wow thanks for the advice

 

Apparently aamco does free diagnostics of AC systems, so i'm just going to take it there.

 

I dont think you need a diagnosis- the compressor valves are bad. Thats the problem.