Interior Blower/Fan - NO OFF

[CMJAnew]

Drove my '90 Vert for the first time since last fall. 

The interior blower fan will NOT shut off. 

Pulled the fuse I thought was for it, as well as a couple others - Still continued to run.

Did unplug the connector to the fan that is under the hood - this did shut it off.

I cleaned both the plug and receptacle with 'dust blaster / canned air - fan continues to run when plugged back in.

 

What is the next logical step to fix? I AM NO WAY/NO HOW MECHANICALLY INCLINED.

 

Thanks 

[waltmail]

I am sure someone will jump in momentarily. Common problem, See this for the usual suspect part.

 

http://thereattastore.com/acdelco-15-72530-blower-motor-control-module/

 

 

[drtidmore]

57 minutes ago, waltmail said:

I am sure someone will jump in momentarily. Common problem, See this for the usual suspect part.

 

http://thereattastore.com/acdelco-15-72530-blower-motor-control-module/

 

 

I concur.  When the blower refuses to turn off, it is the blower motor control module.  Fortunately, they are easy to find and easy to replace.

[Barney Eaton]

Hope this helps.......pictures are out of sequence.

Last picture shows where it is in A/C duct...it is item #1

Middle picture shows the unit out of car

first picture show hole it goes into and inside that hole is the evaporator for the A/C, check the front of the evaporator for debris that has collected...

vacuum the front and improve A/C air flow

 

The list below is from RockAuto showing all the GM cars that used this blower motor module

Buyer's Guide : ACDELCO 155876 Blower Motor Control Module / Resistor

BUICK	1985-1999
CADILLAC	1986-1999
CHEVROLET	1986-2001
GEO	1989-1997
GMC	1986-1999
OLDSMOBILE	1985-1999
PONTIAC	1986-2000
SATURN	1993-2007

Please refer to catalog for application details.

 

Edited June 1, 2017 by Barney Eaton (see edit history)

[harry yarnell]

I've got good used for $37 postpaid.

[CMJAnew]

Thanks Everybody

 

[DAVES89]

When you removed the lead you did almost have the work. The only thing left is to unplug the other lead and then look for the 3 each 7mm screws. The back one is the harder one, but when you replace the module just put the 2 easier ones in. On a scale of 1-10 it probably is a 2 or 3 fairly easy.