One day the AC was working fine, the next day it simply doesn't come on The switch indicator light is working fine, and the basic symptom is: absolutely no response, no click, no change in engine vibration, no increase in radiator fan speed
I intend to check in the following priority:
1. Check fuse
2. Check relay, since there's no "click" sound indicating relay function
3. If even that's OK, then check the compressor clutch (I clutch at my heart when I contemplate this!)
If that OK too, what else could it be? Even if the gas had escaped overnight, the click sound and the subtle change in engine load and radiator fan speed would have indicated that all other systems were OK
You can also check Mostly blown fuse and check for ac gas. if low pressure may not let the compressor to start, too.
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