1989 Cadillac Deville Defrost works?

CASINOGURU17

MEMBER
1989 CADILLAC DEVILLE
V8
FWD
AUTOMATIC
135,000 MILES

When I start up the car I hear a click click click noise witch is something to do with the air. If I turn the air on it comes out of the front vents like normal. If I turn on the heater it comes out the top and bottom and is not very warm. If I turn on the defrost it works fine and is very warm. Today was 17 out and I froze my butt off. Any ideas?

Friday, December 5th, 2008 AT 9:07 PM

4 Replies

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi:
Is the engine running at a normal operating temp? If not, replace the thermostat.

Joe

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Friday, December 5th, 2008 AT 10:33 PM

CASINOGURU17

MEMBER
3 POSTS

I dont know what the engine is running at. There isnt a temp gage on my car. It seems to be though.

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Saturday, December 6th, 2008 AT 10:11 AM

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi:
Without knowing for sure, the only choice is to have the coolant temp tested by a mechanic. However, before you do that, craw under the dash and see if you can identify where the clicking sound is coming from. It may be a stuck vent door that isn't opening or closing causing the heat problem. If that doesn't work or you can't find a problem, have the temp checked. Your mechanic will have a thermometer that can read high temps and it's kust a matter of removing the rad cap, placing the thermomter in the rad and allowing the car to warm up.

Let me know what you find.

Joe

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Saturday, December 6th, 2008 AT 2:05 PM

CASINOGURU17

MEMBER
3 POSTS

Well Joe I took it in to the Cadillac dealership where my father in law works. The Thermastat was busted and the radiator was cracked. So They are fixing both of them now and $419.00 later it should be fixed. Thanks for all the help.

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Thursday, December 18th, 2008 AT 2:57 PM