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Chef Jeff
New User
Mar 10, 2008, 1:38 PM
Post #1 of 6
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Cadillac no heat
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My mother owns a 1992 Cadillac Deville with a 4.9. The vehicle will not blow hot air. The blend door moves appropriately. I replaced the thermostat. The AC compressor seems to operate continuously, even when set at the highest possible temperature. Is the most likely scenario a plugged heater core? Any thoughts? Thank you.
(This post was edited by Chef Jeff on Mar 10, 2008, 1:42 PM)
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dave284
Enthusiast
Mar 10, 2008, 3:11 PM
Post #2 of 6
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Re: Cadillac no heat
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There are a inlet line and a outlet line at the firewall to the heatercore, feel the hoses, both should feel about same temp,if theres a noticable difference more than likely its the core,other signs include air in the system,waterpump, and the thermostat installed wrong way,bad temp switch
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Chef Jeff
New User
Mar 12, 2008, 3:41 PM
Post #3 of 6
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Re: Cadillac no heat
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Replaced the core with great results. Thanks for the input. 
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dave284
Enthusiast
Mar 12, 2008, 5:45 PM
Post #4 of 6
(3335 views)
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Re: Cadillac no heat
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Glad it helped,just post your auto problems and we'll do all we can to help
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Double J
Veteran
/ Moderator
Mar 12, 2008, 6:34 PM
Post #5 of 6
(3333 views)
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Re: Cadillac no heat
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"ATTA BOY DAVE"!!!!!!
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dave284
Enthusiast
Mar 12, 2008, 9:25 PM
Post #6 of 6
(3330 views)
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Re: Cadillac no heat
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Thanks Jim , I needed some encouragement after that van deal
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