2004 chevy avalanche with dual control system problem

Does the vehicle have dual zone climate control, where the driver side and passenger side have different control? Sounds like a blend door issue on the driver side. Why did you replace the passenger side, was it blowing hot too when AC was on?

Battery Disconnect or Replacement Problems

you may need to re calibrate the system

wakow4u, What you have to do is look for a vacuum line that comes from the engine and enters the passenger compartment through the firewall. This vacuum line controls the climate control. A small rubber hose that fits tightly will suffice as a good and quick repair. Good luck with this.

A/C Vent Door Actuator, Google it just like that and type your Vehicle Make and Model, this is a very common problem with Chevrolet Vehicles that have Dual climate controls. good Luck.

I had a similar problem and thought to solve it my adding freon. When I made the connections I was surprised to find that the pressure was already higher than it should be.

Changed plan at that point and vented freon back into safe range. The A/C immediately began blowing cold again on both sides. Found out later that if the A/C had been serviced / filled on a cold day, that on a hot day in Texas it would be too high and cause the issues you noted.

dual climate controls are freon sensitive , be sure
your system is fully charged.

The Trainer 40 When the compressor won compress

back lighting for a couple of the climate control dash board buttons are not working. ?????? wouldn't be a fuse , bulb probably . You would need to take the component apart to replace the bulb .

Hi, a P0446 means Evaporative Emission Control System Vent Control Circuit Malfunction

Full details @ http://www.obd-codes.com/p0446

Its more then likely the temp door broken or temp door motor broken/stuck. There is 2-3 of these motors under the dash on the side of the evap/heater core box. Some require extensive labor to replace, good luck