shanko

I purchased a 2005 Coupe and the climate control seems to have a mind of its own. Looking for advice. Here are the symptoms:
1.) In auto mode, no matter what the temp. outside the unit kicks on the AC and goes to full fan.
2.) In Manual mode with the AC off, I can raise the fan speed with the up button and the display shows the bars increasing. When I lower the fan speed, the fan stays on high but the display shows the bars lowering. Only way to get the fan back down is to shut off the car and restart.
3.) Only way to get heat is to set the temp to about 85, no matter how low the outside temp is.
4.) The Vent control shows the vent position changing but I only get air from the dash vents and the windshield vents, even if I have the floor vents selected.

While all the features appear to show on the display correctly the unit does not follow the commands. Could this be a sensor problem? or am I looking at the Climate Control Module having an issue. Will be tearing the dash apart to replace the HUD next month and while apart would like to eliminate anything else under the dash. Any help/suggestions, would be greatly appreciated, Thanks!

outhouse

These fail regularly replace the module

fourth vette

On my C5, I would unhook battery, wait 10 minutes, rehook battery and all would be fine again.

4SUMERZ

The module do fail from bad soldered joints on the control board.
It may be as simple as that, but it could also be failed temp control actuators, etc.

Try recalibrating the HVAC Module Actuators:
RE-CALIBRATING ACTUATORS
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC control module.
3. Wait 60 seconds.
4. Install the fuse.
IMPORTANT: The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.



The other component that may fail is the Inside Air Temperature Sensor. It has a small motor in it to help circulate the air for temperature measurement.

I sent you a Private message.