A/C & fan acting weird!
#1
A/C & fan acting weird!
I have 2004 Trailblazer. A/C only works in Defrost mode. Also, when fan is "on" is goes off temporarily when I hit a bump. Not long ago, all began working correctly, but then radio went off, clock had to be reset. Now it's back to Defrost mode only and fan working weirdly. Huh???
#2
CF Junior Member
With the engine running AC blower motor on high and other accessories / lights on, check power of the fuses in the fuse block under the left rear seat, if some have low voltage it is likely you have a bad ign switch.
#3
A/C problems - more questions to Bern
Thanks for your response. I'm confused. How is a bad ignition switch related to the A/C and fan (and I forgot to mention the Cruise Control was temperamental at the same time but now it's back to "normal.")
#4
CF Junior Member
The power for the AC / blower motor goes though the Ignition switch. this is why the AC doesn't operate with the ignition switch off.
this is one possible cause : The dealer service department can test for this . #PIT3832D: ABS Red Brake SVC And 4WD Light On HVAC Blower Inoperative - keywords B1375 C0379 DTC HI2 HI4 ignition IPC L04 MIL on U1000 U1041 - (Jan 7, 2009)
this is one possible cause : The dealer service department can test for this . #PIT3832D: ABS Red Brake SVC And 4WD Light On HVAC Blower Inoperative - keywords B1375 C0379 DTC HI2 HI4 ignition IPC L04 MIL on U1000 U1041 - (Jan 7, 2009)