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

96,265

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.
96,265

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.
96,265

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.
96,265

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.
96,265

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.
75,645

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.
75,645

Yes. HTH. -Jim

1,840

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?

1,840

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

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