no power to the ac compressor

[66furywagon]

76 new yorker atc2
i have no power to the comp
if i unplug it and use straight to the battery it blows cold like it should
any help thank you

 

[commando1]

:silent:

 

[Big_John]

Try bypassing the low pressure switch. If you have power, that most likely means the pressure is too low. If no power, it's coming from the dash. That could be the switch, wiring, fuse etc.

 

[66furywagon]

Put in new low pressure switch still no power

 

[70bigblockdodge]

If you do not have power at the low pressure switch problem is in the dash.

 

[66furywagon]

Ok will start with the switch a/c