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AC/Heater Blower motor won't shut of

Tiny
DCHENEY
  • MEMBER
  • 1995 BUICK PARK AVENUE
Electrical problem 6 cyl Front Wheel Drive Automatic 183550 miles

The AC/Heater blower motor runs all the time even with ignition off. Had to remove 30 amp fuse in engine compartment to shut off blower motor. Electrical diagram shows 30 amp fuse powers a blower motor relay. Found 6 relays under the fuse bank in engine compartment. With 30 amp fuse reinstalled disconnected each relay one at a time. The blower motor still keeps running. Could not find any more relays in the engine compartment. Please tell me where the AC/Heater blower motor relay is.

Thank you.
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Wednesday, June 18th, 2008 AT 12:52 PM

26 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
It sounds like you have a relay stuck on, here is its location so you can remove and replace it.


https://www.2carpros.com/forum/automotive_pictures/139033_ac_7.jpg



Here is a guide to help you test to confirm the problem.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let us know what happens so it will help others
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Saturday, June 21st, 2008 AT 5:59 AM
Tiny
JOHNBAILEY
  • MEMBER
  • 1 POST
I have a 95 park ave but where the blower motor relays are they are not there not even a connection to plug one in. Where else could they be?
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Friday, September 7th, 2012 AT 1:02 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

I have seen where the fan speed control module will short out causing the fan to stay one as well. Here is a diagram that will show you where it is.

Please let us know what happens.

Cheers, Ken
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Thursday, August 17th, 2017 AT 7:48 PM
Tiny
FELICIA110
  • MEMBER
  • 5 POSTS
  • 1996 BUICK PARK AVENUE
Air Conditioning problem
1996 Buick Park Avenue 6 cyl Two Wheel Drive Automatic 75000. Miles

when I returned home today my blower motor would not shut off. It is continuously running. Where do I locate the relay for the blower motor?
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi felicia110, Welcome to 2carpros and TY for the donation and selecting us as your auto repair site Feel free to ask questions at anytime and Merry Christmas and a Happy New Year 2010

Location: Center rear of engine compartment see road map below

There's 2 relays one for the low and one high speed relay-No.8 is the low and high is no.9 -Check and test both


https://www.2carpros.com/forum/automotive_pictures/12900_blower_relay_7.jpg

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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
FELICIA110
  • MEMBER
  • 5 POSTS
I found those disconnected them and the blower still runs, must be something else
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Put the relays back in place I want you to remove fuse no.3 30amp in the right underhood fuse block-did the blower motor continues to run?
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
FELICIA110
  • MEMBER
  • 5 POSTS
Yes it stopped running
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
84DAVEY
  • MEMBER
  • 3 POSTS
  • 1994 BUICK PARK AVENUE
  • 202,000 MILES
Cab fan heater/air conditioner fan - continues to run after key switch is shut off, and key taken out of iginition. I disconnected the battery and let the car sit over night, and then re-connected the battery in the morning, upon re-connection the fan took off running again.
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The red and purple wire are shorted together, where this 2 wires meet at is at the high speed blower relay socket-try clean out the relay socket could be corrosion that's causing it-


https://www.2carpros.com/forum/automotive_pictures/12900_blower_relay1_1.jpg

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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Do you have auto climate control? Also do you have a multi meter to do some testing?
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
FELICIA110
  • MEMBER
  • 5 POSTS
Thank you for your help. It must be in the harness in in the control panel, I have cleaned the relay and the socket but still blows
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
84DAVEY
  • MEMBER
  • 3 POSTS
Yes the car has auto climate control - but no I do not have a mutimeter
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
That red and purple wire are touching, you have remove the relays and it still come on, but when your remove the fuse it stops-The fuse is powered at all time thru the red wire if it touches the purple wire the blower motor will continuesly run-this is what's happening
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
84DAVEY
  • MEMBER
  • 3 POSTS
Hello?
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
FELICIA110
  • MEMBER
  • 5 POSTS
Ok will check it out throughly in the morning thank you so much
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
On the center rear of the engine compartment you will find the blower control module. It has a purple wire gray wire with a black stripe a black wire and red wire. Unolug it and see if the blower motor shuts off?Also a multi meter would be great to test some things.
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
BRAD1234
  • MEMBER
  • 2 POSTS
  • 1994 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 210,000 MILES
My heater fan stays on high speed even when the ignition is off and key removed. I think it is the blower motor resistor/module that has failed. Can you tell me if this is true and if so how to get to the module?
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect and test the blower motor control module at center rear of engine compartment
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Monday, August 19th, 2019 AT 6:34 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I gave you for an Auto HVAC system Park Avenue and Ultra


https://www.2carpros.com/forum/automotive_pictures/12900_hvac_5.jpg

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Monday, August 19th, 2019 AT 6:34 PM (Merged)

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