2003 Cadillac Cts No Heat On Driver Side. Passenger Side Works Fine

This is caused by a defective air temperature control blend door actuator motor or a jammed blend door or in most cases both..

There are a couple of possibilites. 1 Is your vehicle equipped with seperate climate controls for the driver and passenger, if so your warm/cold air motor door on the drivers side is malfunctioning. This is located under the dash.2 Your climate controls on your dash are not working properly. Hope this helps.


Please take a moment and rate my answer..........Thanks

There is a temp door actuator motor that is not working for that side,the dash has to be removed and laid on the front seat to replace the actuator motor,

i've been down here too myself, and discovered that the temp control motor, located in the bottom of the glove box, which you can access by clearing all your stuff in in and opening a small door.
you can adjust it manually, and see if it changes, if yes, the switch can be defective, as well as the motor, the switch is the most likely problem.
but adjust it manually first.

Phil
grandmotors.ca

Check operation of passenger side air direction deflector vane in the heater ducting.
You may have a seized vane hinge or faulty actuating servo/control.

If the blower is blowing air just fine, but you cannot control the temperature, you need to listen to air coming from the vents while turning the temperature from hot to cold. If you do n ot hear any change in airflow, then you may a temperature door in the dash broken. this is becoming a common problem on the Equinox

Tech JK
-----

you want me to post a free solution yet want to charge for info I requested for free?

The air doors are controlled by actuators that on of them or so may need replacing.

junk it its not worth it one of the sensors that open and shut the door are bad

Did you check your coolant level or was it low and you added to it at some point? If so the system my need to be bleed or worst case the thermostat is going bad.