ac not working
#1
Starting Member
Thread Starter
Join Date: Aug 2010
Location: St Louis
Posts: 196

2003 BlaZeR2
I have the wiring diagram. I checked fuses. All seem good. pulled the AC relay out a little so the posts were showing. Had 12v at 3 posts but not the third. Bad relay?
I ran a jumper wire from BAT+ to the green wire at the compressor clutch. Clutch activated. Left it there for a couple minutes. Didn't really seem to get cool in the truck. I would rather not have to spend $$$$ on freon if it is not needed.
I have the wiring diagram. I checked fuses. All seem good. pulled the AC relay out a little so the posts were showing. Had 12v at 3 posts but not the third. Bad relay?
I ran a jumper wire from BAT+ to the green wire at the compressor clutch. Clutch activated. Left it there for a couple minutes. Didn't really seem to get cool in the truck. I would rather not have to spend $$$$ on freon if it is not needed.
#2
Super Member
Join Date: Jul 2009
Location: Oklahoma
Posts: 1,603

If it doesn't get very cool you probably need to check the refrigerant charge and if it is low enough it will cause the compressor to kick on and off.
If the system is overcharged it will also reduce it's cooling ability.
If the system is overcharged it will also reduce it's cooling ability.
Last edited by 84BlazerS10; 03-21-2011 at 09:15 PM.
#3
Starting Member
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Join Date: Aug 2010
Location: St Louis
Posts: 196

Well today I swapped the ac relay with the horn relay. I wish I could say that fixed the issue.
A neighbor came out while I was working on it. Turns out he has a low side gauge. Hooked up and saw that it was really low. Threw a couple cans of 134 in it and now it works great. However, when I pulled the gauge off after topping it off, I noticed bubbling in the low side port. Looks like I found the leak. Is the schrader valve replaceable by itself or do I need to replace the whole accumulator? For now, Im just leaking the gauge on it (since I can get it to seal) until I can get the leak fixed.
A neighbor came out while I was working on it. Turns out he has a low side gauge. Hooked up and saw that it was really low. Threw a couple cans of 134 in it and now it works great. However, when I pulled the gauge off after topping it off, I noticed bubbling in the low side port. Looks like I found the leak. Is the schrader valve replaceable by itself or do I need to replace the whole accumulator? For now, Im just leaking the gauge on it (since I can get it to seal) until I can get the leak fixed.
#4
did you use the R134 with sealer in it ? maybe that will take car of it for now if you did
#5
Super Member
Join Date: Jul 2009
Location: Oklahoma
Posts: 1,603

I'm not sure specifically but I think you would have to replace the whole accumulator.
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2003, ac, accumulator, air, blazer, blowing, chevy, compressor, conditioner, diagram, engaging, location, relay, stopped, working







