Heater

60

Asked by Nov 20, 2016 at 12:00 AM about the 1985 Buick Riviera Coupe RWD

Question type: Maintenance & Repair

I turned off the car and the heater still blows air
threw the vents even without the keys in the
ignition

18 Answers

85,605

Does it just keep blowing or does it turn off automatically after a minute or two?

2 of 2 people found this helpful.
60

I left it on for awhile and it kept blowing so disconnected the ground

1 of 1 people found this helpful.
85,605

If you left the fan running until the battery got weak it might be possible that the relay could not switch the power off. Did this problem re-occur after you drove the car the next time?

1 of 1 people found this helpful.
60

I got off work drove it home and turned off the car but it kept blowing. I turned it off and on a few times and still it blowed. I then disconnected the ground reconnected the ground left it on for a while and it just kept blowing so i diconnected it again

1 of 1 people found this helpful.
85,605

Maybe it is a stuck relay.

2 of 2 people found this helpful.
60

Were is that located and how would i go about fixing it

1 of 1 people found this helpful.
85,605

I can't find a wiring diagram for your car but you may want to buy a repair manual. Most have wiring diagrams. Trace out all the components of the fan system and look for anything that would keep the fan going when it should be switched off.

1 of 1 people found this helpful.
60

Is there a way to disconnect it for now untill i can get the manual

1 of 1 people found this helpful.
85,605

Try and pull the fuse.

1 of 1 people found this helpful.
60

I appreciate the help. I looked at the owners manual and tried one of the fuses. Maybe it wasnt the right one. I will take a look in the day time. Thanks again

1 of 1 people found this helpful.
72,345

There's two fuses for the blower motor. One for high speed only, and a second fuse for the other 3 speeds. HTH. -Jim

60

Are the fuses at the fuse box under driver side dash

1 of 1 people found this helpful.
72,345

Yes. HTH. -Jim

1,720

You did not say what the car is....you name might indicate it is a Riviera.....in that case there is a blower fan controller that goes bad and has the symptoms you are seeing. It is located on the passanger side of the firewall, two connectors plug into it and there are three screws that must come out. The part was used on all GM cars that had "automatic" air from about 1986 to 1994 and they can be found in salvage yards or you can pay about $60 for one at a parts store GM part goes for over $100 see picture for location.

60

It is a 85 riviera. I found two plugs under the hood on passanger side. I pulled the smaller plug of the two and it turned off. Now i have no heater. So i need to fix the blower fan control?

1,720

You need to replace the fan controller....item #1 in the picture above.

60

Thank u very much

60

I bought a blower switch i just know were it goes. Could you please help me

Your Answer

Riviera

Looking for a Used Riviera in your area?

CarGurus has 105 nationwide Riviera listings and the tools to find you a great deal.

ZIP:

Buick Riviera Experts

  • #1
    Alvin1966
    Reputation
    1,120
  • #2
    Chris Kelley
    Reputation
    550
  • #3
    Jason Zane
    Reputation
    410
View All

Related Models For Sale

Used Buick Regal
147 Great Deals out of 7,598 listings starting at $3,995
Used Chevrolet Corvette
162 Great Deals out of 17,423 listings starting at $3,000
Used Chevrolet Impala
572 Great Deals out of 34,341 listings starting at $890
Used Chevrolet Camaro
438 Great Deals out of 31,256 listings starting at $1,450
Used Dodge Charger
447 Great Deals out of 32,879 listings starting at $1,999
Used Buick LeSabre
7 Great Deals out of 1,714 listings starting at $899
Used Cadillac DeVille
6 Great Deals out of 1,516 listings starting at $1,999
Used Buick Electra
19 listings
Used Ford Mustang
599 Great Deals out of 38,611 listings starting at $1,895
Used Chevrolet Monte Carlo
11 Great Deals out of 1,252 listings starting at $1,488
Used Ford Thunderbird
20 Great Deals out of 1,049 listings starting at $6,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.