Join Date: May 2010
Location: Hobart, Indiana
Re: Heat/AC system not working, help!
I am going to base this off of a automatic heater control HVAC system since you say that the numbers change. I am also just guessing what year you have, but it should be the same across the board for gen 7. When you have time it will be helpful to others to have a signature which can be created in the user control panel.
The best thing I can think of starting with is turn the key off, disconnect the battery for a minute, and reconnect it again. Then, turn the key to the on position and let it sit for another minute, but don't mess with any of the HVAC controls. This should recalibrate all of the actuators in the system. After the minute cycle the key off and the back on and try it again.
If that doesn't work you will probably have to take it to the dealer to find out the codes in the system and get it diagnosed.
09' Malibu LTZ with brick leather interior
4 cyl w/6 speed auto
Silver Ice Metallic paint
Mods: PTM bow ties, grill, washer nozzles, and fog light trim
-MTX600XD, 2 12" Infinity Kappa Perfect 12.1, 4 gauge stinger wire, Pioneer 7800MP CD player
-5000K HID headlights and 3000K fog lights
-White LED's in the switches and handles
-Blacklight overhead console LED's
-Painted and polished factory aluminum wheels
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