OK, I hate to ask but, the other day I found a post that listed several switches/sensors that affect the ac clutch. Tonight, I can't seem to find it again. Aside from the low and high pressure switches, what other switches or sensors would stop power from getting to the clutch on a 99 Blazer. I have already checked the relays and fuses.
Thanks in advance

 

come on, no ideas?

 

dude
you need to give time for answers. this isn't a professional help site

 

The HVAC control module is the only other thing that controls the A/C clutch aside from the high & low side switches & relays/fuses.

 

Thank you for the info.

 

Well, after scratching my and and pulling my hair out, I found the problem with my a/c. Most of the contacts in the power center under the hood are corroded. I cut up a couple of emery boards and cleaned all the contacts. I am happy to say "my a/c works again".

 

Man that was lucky, I was going to make sure you put enuff freeon in it lol. And I know 'freeon' isnt spelled like thats lol. Because to much and not enuff both can cause this problem.

 

Well... for posterity..and future readers.... DONT DO THAT!

First thing you check is one at a time, you jumper the connector on the Accum.. then the Hi press switch.
- If jumping accum switch does it, you feel line going into accum, then compressor to see if they get cold.
If line into compressor gets cold then it's bad switch on accum.

Doing that simple test will prevent dumping in too much freaon