Climate Control Temp

[diezelraccoon]

I just got a 2003 Chevy Tahoe LT with the dual climate control with the LCD screen and two temp knobs. I just replaced the climate control module with an aftermarket Dorman unit. I noticed today that when it’s on bottom temp and I turn it up the temp does not really change until I go from 60 to 90 degrees. Could this be a blend door actuator issue?

 

[Fless]

No. Exercise your Dorman lifetime warranty and get another new HVAC control.

 

[diezelraccoon]

No. Exercise your Dorman lifetime warranty and get another new HVAC control.

What do you suggest?

 

[Fless]

Get the vendor to exchange it for one that works. Dorman's warranty is done through the retailer.

 

[strutaeng]

Mine did the same thing: it was either COLD no matter what the temperature was set from 60-88, then at 90 it was full heat.

Was it doing this same thing before you replaced the control module?

On mine it was actually the little temperature sensor that has a wheel and goes on the driver's side headliner. I almost replaced the module thinking it was that...

 

[diezelraccoon]

Get the vendor to exchange it for one that works. Dorman's warranty is done through the retailer.

So get another Dorman unit?

 

[diezelraccoon]

Mine did the same thing: it was either COLD no matter what the temperature was set from 60-88, then at 90 it was full heat.

Was it doing this same thing before you replaced the control module?

On mine it was actually the little temperature sensor that has a wheel and goes on the driver's side headliner. I almost replaced the module thinking it was that...

Now that I think of it above my head is that little fan above my head and it’s making a whining kind of sound

 

[diezelraccoon]

Mine did the same thing: it was either COLD no matter what the temperature was set from 60-88, then at 90 it was full heat.

Was it doing this same thing before you replaced the control module?

On mine it was actually the little temperature sensor that has a wheel and goes on the driver's side headliner. I almost replaced the module thinking it was that...

Also I was not sure if it was doing the same thing cause the temperature dials on the factory unit would not work. You would try and turn up the temp and it would go crazy and just bounce around in the 60 to 70 degree range.

 

[Jack Treehorn]

Now that I think of it above my head is that little fan above my head and it’s making a whining kind of sound

This sounds like your Cabin Air Temperature Sensor Aspirator. The GM P/N is 22834330, around $45. It's easy to replace, lots of videos out there.

 

[Jack Treehorn]

Also I was not sure if it was doing the same thing cause the temperature dials on the factory unit would not work. You would try and turn up the temp and it would go crazy and just bounce around in the 60 to 70 degree range.

Okay, first - do not throw away your old OEM climate control module! The Dorman replacements are problematic, exp with fan control. Your old OEM module can be repaired. The rotary encoder brushes on the climate dials get contaminated/wear out making the settings erratic (bouncing all over) as you turn the knob to set. So you need new encoders, they are about $7 with shipping. I found direct replacements https://www.aliexpress.us/item/3256804356862911.html. They take 10 days to ship but they are drop in replacements. You'll need to find someone who's pretty decent with de-soldering. There are tabs on the encoders that need the solder sucked out to remove.