The Diesel Stop banner

A/C not working please help

1329 Views 4 Replies 5 Participants Last post by  fulltimer50
Hi guys

I rencently drove to Montana from San Diego CA my A/C and fan were working fine but when I arrived in MT my A/C stopped working and has not worked since what could be the problem? My truck has 60,0000 miles. Also when I turn the know from A/C to off it still makes the hissing sound. /ubbthreads/images/graemlins/shrug.gif

See less See more
1 - 1 of 5 Posts
Could be a few things.

No 12v to the compressor.

A/C clutch coil shot

A/C clutch shot (just had mine replaced last week)

The hissing sound you're talking about is the vacuum. It is a normal sound whether or not the A/C works. The 'A/C switch' determines where the air comes out. It makes that hissing sound no matter what. Run your truck, turn it off and pull the key out. Keep switching the HVAC control switch and as you cycle past vent locations, you'll hear the hissing. Has nothing to do with A/C itself (unless of course the switch itself is bad and preventing 12v to go to the compressor).
1 - 1 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.