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View Full Version : my a/c sucks.

jabartram
08-14-2010, 07:29 PM
I spent the better part of the day, replacing my a/c compressor, receiver/dryer, expansion valve, flushed the a/c system added in proper oil got pressures running within gm factory specs and it only gets to 70* at idle! depending the heat of the day 55* at freeway speeds. i'm very good with a/c work, but my car refuses to agree with me on output temperatures. the only piece i havent replaced is the condenser, but it flushed clean as far as i could tell.

any ideas?
[ion] C2
08-14-2010, 07:46 PM
edit: my original message is likely irrelevant to your specific situation
robalero
08-14-2010, 08:19 PM
have you tried different refridgerent? it may just be whatever kind you were using
jabartram
08-14-2010, 09:55 PM
134a same as factory.
AleroB888
08-14-2010, 11:45 PM
I spent the better part of the day, replacing my a/c compressor, receiver/dryer, expansion valve, flushed the a/c system added in proper oil got pressures running within gm factory specs and it only gets to 70* at idle! depending the heat of the day 55* at freeway speeds. i'm very good with a/c work, but my car refuses to agree with me on output temperatures. the only piece i havent replaced is the condenser, but it flushed clean as far as i could tell.

any ideas?

What were the original symptoms, and why had to replace so many components?
jabartram
08-15-2010, 12:25 AM
What were the original symptoms, and why had to replace so many components?

6 years old and im just like that, i'm gonna go ahead and replace the condenser.
temperature output is just not satisfactory.
guiguilandry
08-15-2010, 12:29 AM
How long did you do the vacuum before charging the system and how much r134a did you put back in ???
jabartram
08-15-2010, 12:50 AM
How long did you do the vacuum before charging the system and how much r134a did you put back in ???

i'm gonna put on one of our a/c machines at my shop this week.
Cliff8928
08-15-2010, 01:40 AM
It should be for at least 1/2 hour on the vacuum.
jabartram
08-15-2010, 01:45 AM
It should be for at least 1/2 hour on the vacuum.

30 inches of vacuum for 45 mins. twice today.
Cliff8928
08-15-2010, 02:29 AM
The cooling fans are running when you have the A/C on?

You said you changed the expansion valve. Did you mean the orifice tube? I didn't think the Alero had a TXV.
jabartram
08-15-2010, 10:01 AM
The cooling fans are running when you have the A/C on?

You said you changed the expansion valve. Did you mean the orifice tube? I didn't think the Alero had a TXV.

cooling fans work, yes orifice tube, expansion valve is common for trucks, its habit.
Cliff8928
08-16-2010, 12:25 AM
Did you use a fixed or variable orifice tube? Your replacement compressor was a reman or new? Does it have the correct control valve in it (it's held in with a snap ring on the side of the rear cover)? Is the screen on the suction side of the compressor clean if it's there?

Is the evaporator core ridiculously dirty? You didn't mention replacing it.
Hectic
08-24-2010, 06:06 PM
Mine was having problems, and would just blow warm.

Changed the AC Clutch, pulley, and serpentine belt. Haven't had a problem since.