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Cadillac no heat


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Chef Jeff
New User

Mar 10, 2008, 1:38 PM

Post #1 of 6 (2798 views)
post icon Cadillac no heat Sign In

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)


dave284
Enthusiast
dave284 profile image

Mar 10, 2008, 3:11 PM

Post #2 of 6 (2791 views)
Re: Cadillac no heat Sign In

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 switchUnsure


Chef Jeff
New User

Mar 12, 2008, 3:41 PM

Post #3 of 6 (2776 views)
Re: Cadillac no heat Sign In

Replaced the core with great results. Thanks for the input. Wink


dave284
Enthusiast
dave284 profile image

Mar 12, 2008, 5:45 PM

Post #4 of 6 (2773 views)
Re: Cadillac no heat Sign In

Glad it helped,just post your auto problems and we'll do all we can to helpWink


Double J
Veteran / Moderator
Double J profile image

Mar 12, 2008, 6:34 PM

Post #5 of 6 (2771 views)
Re: Cadillac no heat Sign In

"ATTA BOY DAVE"!!!!!!


dave284
Enthusiast
dave284 profile image

Mar 12, 2008, 9:25 PM

Post #6 of 6 (2768 views)
Re: Cadillac no heat Sign In

Thanks Jim , I needed some encouragement after that van dealSmile






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