1984 Cadillac Deville - heater not working
#1
1984 Cadillac Deville - heater not working
I don't drive the car in the winter, but I would like to fix this, I have no heat, it just blows cold air, the lined into the core are cold, coolant is full, upper rad hose is warm, but I don't feel a big surge if I pinch it, can a bad water pump cause this? is there anything else I can look at?
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#5
RE: 84 heater not working
Remove the glove box liner. You will see a threaded metal rod attached to a white plastic arm. As temperature changes and the climate system is on, the arm will move the rod allowing heated air into the cabin. To verify, start car, in "auto" mode, change the display from 60 to 90 degrees. You will see the rod move away towards the firewall at 60 degrees and towards you at 90 degrees. This arm should move slowly and smoothly and take a couple on min. to fully react. If the rod does not move or is jerky, the climate control module needs replaced. Thats the large black box the plastic arm comes out of. The rod simply moves the blend door in the dash much like sliding the lever in a manual heat/A/C system. Verify the rod movement and report back.
#6
1984 Cadillac Deville - heater not working
ORIGINAL: fishnmachine
I don't drive the car in the winter, but I would like to fix this, I have no heat, it just blows cold air, the lined into the core are cold, coolant is full, upper rad hose is warm, but I don't feel a big surge if I pinch it, can a bad water pump cause this? is there anything else I can look at?
I don't drive the car in the winter, but I would like to fix this, I have no heat, it just blows cold air, the lined into the core are cold, coolant is full, upper rad hose is warm, but I don't feel a big surge if I pinch it, can a bad water pump cause this? is there anything else I can look at?
May I assume that you meant "THE lines into the heater core are cold" ? ? ?
When was the coolant changed? if longer than two years, I suggest you jump on that ASAP.
Have you checked the arm and control module that carnut suggested?
Have you back flushed the heater core?
Has the heater ever worked since you bought the car? (is the core connected?)
Does the A/C work, meaning it blows ice cold air?
.
#7
RE: 1984 Cadillac Deville - heater not working
the car has not overheated
yes the lines into the core
coolant is new, not fushed though
heater has never worked
AC works fine
I have owned the car for about a year but have only put 300 miles on it. I will try what carnut said and let you know. Thanks
yes the lines into the core
coolant is new, not fushed though
heater has never worked
AC works fine
I have owned the car for about a year but have only put 300 miles on it. I will try what carnut said and let you know. Thanks
#8
RE: 1984 Cadillac Deville - heater not working
ORIGINAL: fishnmachine
the car has not overheated
yes the lines into the core
coolant is new, not fushed though
heater has never worked
AC works fine
I have owned the car for about a year but have only put 300 miles on it. I will try what carnut said and let you know. Thanks
the car has not overheated
yes the lines into the core
coolant is new, not fushed though
heater has never worked
AC works fine
I have owned the car for about a year but have only put 300 miles on it. I will try what carnut said and let you know. Thanks
Status ?