Heat Controls

rog_ski · October 18, 2009

I have a 2003 GM extended cab and the I can not adjust the heat on the drivers side.

The drivers side temperature control will slide freely, seems normal, from hot to cold but it will always blow hot. Passenger side adjustment works fine and will blow hot to cold. I can also adjust where the air comes from, floor, vents, defrost, so that all works,

Has anyone run into this before, is there a mechanical linkage on the back side that would have come undone, or is it an electrical connection.

Thanks in advance for any help in solving this issue

Mggray17 · October 18, 2009

I have a 2003 GM extended cab and the I can not adjust the heat on the drivers side.

The drivers side temperature control will slide freely, seems normal, from hot to cold but it will always blow hot. Passenger side adjustment works fine and will blow hot to cold. I can also adjust where the air comes from, floor, vents, defrost, so that all works,

Has anyone run into this before, is there a mechanical linkage on the back side that would have come undone, or is it an electrical connection.

Thanks in advance for any help in solving this issue

Google "Heat Vent Door Actuator" or "HVAC blend door Actuator" for your vehicle. Common problem for GM (and other) vehicles.

Just replaced one in my 2000 Pontiac Grand Prix with the same symptoms. Worked like a charm.

And if it didn't? Well they're still using the same part in my 2008 Silverado. So I would have had a spare for that.

There's a different part number for Manual HVAC controls and Climate Controlled. But they serve the same function: Move the Blend door when required.

rog_ski · October 18, 2009

Thanks for the tip

Its kind of strange now as the Drivers side heat control started working again. Not sure what the issue is but I have Googled "Heat Vent Door Actuator" and have a path to go down before it breaks again

Cheers

dlstewart01 · October 18, 2009

You are lucky it is the drivers side. This actuator is under the dash under the cover. Easy one. The passenger side reguires removing the top of the dash.