Question about 1999 Cadillac DeVille

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Ac/ and heat will not blow either hot or cold air in my 1999 Cadillac deville

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Needs new bower motor

Posted on Jul 18, 2009

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My 1999 cadillac deville air conditioner blows cold on drivers side and hot on passenger side. heater works good on both sides.


Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem. Deville 1996 1999 Factory Service Workshop repair manual

Oct 21, 2016 | 1999 Cadillac DeVille

1 Answer

I have a 93 Cadillac Deville when I turn on the heat it blows a 10 amp fuse and the transmission stops changing gears. What is wrong?


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Jan 10, 2016 | 1993 Cadillac DeVille

1 Answer

Blowing cold air


Bad tempture door actuator. This is on the drivers side of the ac box. Make sure your heater hoses are getting hot. You could have a air pocket in the system

Feb 01, 2014 | 1999 Cadillac DeVille

2 Answers

Why my ac in my cadillac deville 1996 blows hot air?


If your low on freon then the A/C wont come on? for a 1996 you will need to get it serviced if you havent its normal to loose 10% freon a year,

May 06, 2011 | 1996 Cadillac DeVille

1 Answer

I have a 1999 Cadillac Deville Concorse. The climate controls are all on the dash below the radio. The drivers side works perfectly (both hot and cold), but the passenger side works intermittently. If I...


Could be that the hvac control module has an intermittent problem or the air mix door control for the passenger side is sticking. Check for error codes (DTCs) using a code scanner, but may not show an intermittent mechanical issue. If you can get at the air mix control on the hvac box under the dash on the passenger side, you may be able to check its operation.

May 23, 2017 | 1999 Cadillac DeVille

1 Answer

1998 DeVille: 1999 cadillac deville drver side heat blows hot pa...


The blend door for the passenger side is not connected right or functioning correctly. Try seeing if the dial on the armrest on the passenger side is not rotated one way or the other too much.

May 15, 2010 | 1998 Cadillac DeVille

2 Answers

1999 cadillac deville air wont work


There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.

The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.

Dec 18, 2008 | 1999 Cadillac DeVille

1 Answer

No heat


the temp is controlled by a blend door near the heater core and A/C evaporator core deep inside the dash, the blend door has an electric motor called a stepper motor, it has failed, so whenever the door was when it failed is where it will stay, in your case cold air position, to change this part the dash assembly must be removed.

Dec 13, 2008 | 1999 Cadillac DeVille

1 Answer

97 Deville cooling


Hmmm... its gotta be the compressor.

Jul 05, 2008 | 1997 Cadillac DeVille

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