Heater won't work

Asked by Jan 29, 2016 at 07:51 AM about the Cadillac DeVille

Question type: Maintenance & Repair

I have a 93 deville. Bought it and the heater doesn't  
work. The previous owner has a switch from the
relay under hood to inside. It works but only on full
blast. Hhow do I fix the original problem? What do I
need under the hood..

4 Answers

57,655

First you would want to wire it back the way it was originally. Then I suspect the blower motor resistor when bad and needs replacing. I suspect the last owner wired it like this as the blower motor resistor cost over $100.

There are two wire harnesses square and one red and one yellow. And they are female. That's where the owner put the wire for homemade switch. Is the male end of these missing? They should go somewhere?? I'm not a mechanic. Trying to get the car back to original and heater to work from inside.. Thanks..

57,655

If you are to give this a shot, why don't you pick up a blower motor resistor so you know what it looks like. The male ends are on that and it will only take the correct plugin so you know what is what. It is expensive for that car (the resistor) so keep the receipt.

Ok I have installed the resistor new. Still no heat. Wondering if there is a fuse for this or ac programmer bad or blower motor. It's really cold and I need a defroster.

Your Answer

Add photo

Related Questions

  • Heater won't work 3 answers

    I have installed a new resistor for heat to work. Still no heat. Is this ac programmer or blower motor? Or is there a fuse I can't find? It's real cold and I need a defroster.

    1993 Cadillac DeVille

    -

    Maintenance & Repair

  • How does my heater work in 1991 cadillac deville 2 answers

    1991 Cadillac DeVille

    -

    Maintenance & Repair

  • Heater blows some times 3 answers

    my heater come on when it wonts too, I put in a new thermostat but it still blows warm air when it is blowing.

    1992 Cadillac DeVille Base Sedan

    -

    Maintenance & Repair

  • heater switces not working, only once in aq while what to repalce? 1 answer

    try to turn heater fan on some times it works, most times it wont

    2000 Cadillac DeVille Base

    -

    Maintenance & Repair

  • front heater works part time 2 answers

    sometimes it works normal until I turn car off but sometimes it coms back on like normal but most of the time it wont come on unless I hit a railroad tracks,potholle,manholecover before it will come o...

    2003 Cadillac Seville STS

    -

    Maintenance & Repair

DeVille

Looking for a Used DeVille in your area?

CarGurus has 1,598 nationwide DeVille listings starting at $2,000.

ZIP:

Search Cadillac DeVille Questions

Cadillac DeVille Experts

#1 kikero
kikero
Reputation 2,060
#2 Js08016
Js08016
Reputation 1,710
#3 Cynthiasmith
Cynthiasmith
Reputation 1,530
View All

Related Models For Sale

Used Cadillac DTS
50 Great Deals out of 1,592 listings starting at $2,750
Used Cadillac CTS
239 Great Deals out of 11,794 listings starting at $1,599
Used Cadillac Eldorado
382 listings starting at $995
Used Lincoln Town Car
27 Great Deals out of 1,823 listings starting at $1,650
Used Chevrolet Impala
597 Great Deals out of 29,137 listings starting at $1,300
Used Cadillac STS
31 Great Deals out of 1,089 listings starting at $2,088
Used Cadillac Escalade
269 Great Deals out of 10,588 listings starting at $1,900
Used Chrysler 300
355 Great Deals out of 20,745 listings starting at $1,000
Used Dodge Charger
246 Great Deals out of 27,490 listings starting at $1,997
Used Mercedes-Benz S-Class
150 Great Deals out of 6,420 listings starting at $2,300
Used BMW 7 Series
185 Great Deals out of 6,207 listings starting at $3,700
Used Chevrolet Camaro
144 Great Deals out of 35,549 listings starting at $1,995