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Mike Hagi Posted on Dec 26, 2012

Heat not blowing on drivers side in my Cadi CTS

4 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jun 07, 2009

SOURCE: Blows A/C out of Drivers Side, and Heat out of Passenger Side

It is the climate control under the passenger part of the dash. it is easy to fix any way it was for me on my 99 deville. Take the cover off and you should see the controller just about under the clove box it is about 3" X 3" has a rod connected to it and a electric connection on the top and 3 little screws holding it on. Just unscrew the screws and unplug the electric connection and unhook the rod.
Just ask for the climate control switch at the Cadillac Dealer the cost is about $160.

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Anonymous

  • 534 Answers
  • Posted on Oct 30, 2009

SOURCE: 2003 cadi cts - heat only works on drivers side

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.

Testimonial: "thanks, after checking further it seems to be the temp actuator is not working."

Anonymous

  • 26 Answers
  • Posted on Nov 19, 2009

SOURCE: WHAT IS THE MOST COMMON REPAIR FOR 2004 CAD. CTS

I would guess that the control that changes the flow of air from one duct to the next is broken and likely have that one side in the closed position. Old systems used the slide lever to open and closed ducts, but newer stuff, especially cadillacs, use a lot of electronics so it is probably controlled by a motor. I would have some diagnostics done to see if the motor controlling your duct work has fried.

Anonymous

  • 1509 Answers
  • Posted on Nov 26, 2010

SOURCE: my 1994 cadi seville has

The engine coolant might be low as this could have air in the system and ait doesn't transfer heat like coolant does/ the heater core can be stopped up too and flushing it out is a good idea every year. there's no valve in the system so just blow it though with a garden hose and fill it with the right amount of coolant test drive and check the coolnt again. The 4.6 northstar is known for internal leaks and may be leaking. with the key on and the engine off inside the car and everything off except the heater on low move the temperture from hot to cold and listen for the air doors moving a clicking or poping sound is'nt what you want to hear so trace the sound and the air door motor that's clicking may need to be replaced.

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WHAT IS THE MOST COMMON REPAIR FOR 2004 CAD. CTS DUAL HEATER ONLY BLOWS HEAT ON PASS SIDE -- NO HEAT FROM DRS SIDE ?? THANKS,

I would guess that the control that changes the flow of air from one duct to the next is broken and likely have that one side in the closed position. Old systems used the slide lever to open and closed ducts, but newer stuff, especially cadillacs, use a lot of electronics so it is probably controlled by a motor. I would have some diagnostics done to see if the motor controlling your duct work has fried.
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2003 cadi cts - heat only works on drivers side and cold air on passenger side - blower works fine - what might be the problem?

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.
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