1998 Tahoe- AC's blowing warm air...

Messages
203
Location
Pink Hill, NC
The title pretty much says it all... my 98 Tahoe (5.7 V8), is blowing hot air instead of cold. I tried to charge the system with some R134a, but, it didn't seem to take the charge. Anyone have an idea of what might be wrong?
 
Messages
7,430
Location
beaver land EH?
Get your system pressure-tested first before you do anything silly. Casually sticking in a can of recharge R134 w/o knowing your system's condition is a silly move. Q.
 
Messages
23
Location
Houston, TX
 Originally Posted By: Quest
Get your system pressure-tested
You should be able to find a shop to check for freon leaks for 20-30 bucks. Since it's GM I'll say leaking compressor, might just be low though.
 
Messages
21,640
Location
Apple Valley, California
Could just be a bad pressure switch. Adding to a full system will do more harm than good. Is the Compressor clutch engaging? Is the suction line cool or cold? What are the low AND high side pressures? The auto parts stores sell a can that only has a low side guage. These are useless. The high side pressure is more important than the low side.
 

gradymotorco

Thread starter
Messages
203
Location
Pink Hill, NC
Well, i took it to the ac shop... turns out, the compressor wasn't engaging on account of a bad relay. It also was low on freon, but a full charge and $45.00 later, it's blowing ice cubes. Thanks for your help, guys.
 
Messages
19,479
Location
Chicago Area
Checked and diagnosed the system [time], replaced the relay [parts and labor], charged the system [again parts and labor], and only charged you $45????? I will bring all my work there and resell it for profit.
 
Messages
1,714
Location
CA.
 Originally Posted By: mechtech2
Checked and diagnosed the system [time], replaced the relay [parts and labor], charged the system [again parts and labor], and only charged you $45????? I will bring all my work there and resell it for profit.
Wow, I'll be right behind you! AD
 

gradymotorco

Thread starter
Messages
203
Location
Pink Hill, NC
 Originally Posted By: mechtech2
Checked and diagnosed the system [time], replaced the relay [parts and labor], charged the system [again parts and labor], and only charged you $45????? I will bring all my work there and resell it for profit.
LOL... but actually, here in Eastern NC, that's about the going rate (if not a touch high), for that kind of work. I mean, after all, you can get a transmission put in, parts and labor, for $200, so nearly $50 for AC work is a little high.
 
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