It's a C/K series 1990 chevy siverado. The air conditioner works when power is provided.. But, I can't find a fuse to check.. I don't have a diagram it was lost.. But I didn't ses anything there with A/c on it.
SOURCE: No power for AC compressor
try removing the plug off the low pressure switch on the accumalator plug a paper clip into the plug and turn ac on if it comes on then your low pressure switch is bad or your low on refigerant.
SOURCE: 2003 chevy silverado air does
The air vents are control by vacuum line and or linkage.
Listen for hiss or feel for vacuum leak under the dash,
Feel for broken linkage(s) that are close to the vents.
WORK BACKWARD if you have small hands to feel out where is the missing link.
SOURCE: 99 Chevy Siverado AC works then quits
Need to check to see if the cooling fan is working. otherwise need to have guages put on it and find out if the charge is low!
SOURCE: my 2005 siverado duramax check engine light came
try checking the fuse for the cig lighter most chevys power the obd port with this fuse
SOURCE: AC Compressor not engaging on 2000 Chevy Impala.
When your R-134a runs too low it will NOT engage the compressor. You need to refill your a/c system before the clutch will engage, I also suggest finding the leak.
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