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I have a 2003 Chevy 2500HD Duramax. All of a suddent the A/C started blowing hot. :aargh4: Going thru diagnostics all the fuses, high/low pressure switches checked out fine. BTW, this happened after driving through a carwash.
Anyway I came across this over at "dieselplace" dot com.
"Remove the HVAC/ECAS fuse underhood for 30 seconds, reinstall, start the truck, and do not touch any controls for the first 40 secs, allowing the controller to recalibrate and learn. Does AC now work????"
YES, it worked for me. :banana: It sort of reboots the BCM?.? Maybe the carwash made my A/C go haywire because I know it throws off the temp reading on the mirror, maybe that messes with things?
The only thing I don't know is, is this a sign of something going bad? Dunno.
Anyway, I was so happy it worked I needed to share in case anyone else was in need.
Anyway I came across this over at "dieselplace" dot com.
"Remove the HVAC/ECAS fuse underhood for 30 seconds, reinstall, start the truck, and do not touch any controls for the first 40 secs, allowing the controller to recalibrate and learn. Does AC now work????"
YES, it worked for me. :banana: It sort of reboots the BCM?.? Maybe the carwash made my A/C go haywire because I know it throws off the temp reading on the mirror, maybe that messes with things?
The only thing I don't know is, is this a sign of something going bad? Dunno.
Anyway, I was so happy it worked I needed to share in case anyone else was in need.