HVAC Fan cycles to low speed every minute or two
2013 JGC Limited - 40k miles - 3.6l Pentastar
The interior climate control fan cycles to low speed setting every minute or so, stays there for a few minutes, then goes back to the correct setting. The fan indicator bar graph does not change. Adjusting the controls has no effect - not even turning the HVAC on and off. Putting it in gear, and speeding up/slowing down has no effect.
After more investigation - the passenger side is blowing warm air at higher fan speeds - even though the temp is set to LO
This seems to be similar to some of the other posts about HVAC control problems that ended up having a TSB for updated software
I talked to the service manager at the dealer where I purchased and they say they have not heard of any similar problems. This just started last week and I have only used AC, not sure if it happens on vent or heat settings.
Last edited by RMFLMFRLF; 06-21-2014 at 02:15 PM..