Question about 1991 Cadillac DeVille
Replaced heater core checked the box under the glove box it moves car shifts from defrost and heat in the vents and on the floor fine just not hot at all in fact the air conditioning works well in all these positions where do i look for another place to get the hot air into the system? Is there a place I can go to and get a look of the system and show all the workings I could probably solve this. help!!!!! please.
Check t stat by boiling it in water if it doesnt open theres your prob
Posted on Nov 13, 2011
Did this solve the problem, the blend door. I have a 1993 Cad DeVille with the same problem. The Core has been change 2 x by other owner and it has only 94,000 miles on it.
Posted on Nov 07, 2008
Check to see if water is circulateing threw heator core while car is running with heat on feel the heator hoses were they go threw fire walland make sure they feel hot andbe careful you dont burn your self if they are cold replace heator control valve if hoses are hot then you have a blend door prollbem
Posted on Oct 07, 2008
its a problem with the switching mechanism. you have to look up under the dash to see if you can see where the switching mechanism is. if you can not see it from there youll have to remove complete center dash
Posted on Apr 04, 2010
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