Heater/AC controls not working.. help please

[soysauce73]

I own a 2002 Chevy Tahoe LT.

A few weeks ago I noticed that when I attempted to switch the temperature from hot to cold it would only blow hot air. When I pushed the "outside vent" button, it would flash and then stop and continue to blow hot air. Same happened when I pushed the A/C button, nothing but hot air. Regardless of what position the vent controls is in, it still only blows hot air.

I am going to guess that the air controls need to be replaced, but I wanted to see if anyone might have suggestions or have had similar problems?

Thank you in advance,

Soysauce73

 

[feddz]

I have similar issue. My heat is blowing very hot and no matter where I position the temp dial is stays very hot. I tried to turn on the AC and I still get extreme heat. I think the truck knows from the outside temp not to enable the AC. Either way something is wrong and I wanna get this fixed before the warmer temps approach.