CMJAnew Posted June 1, 2017 Share Posted June 1, 2017 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 Link to comment Share on other sites More sharing options...
waltmail Posted June 1, 2017 Share Posted June 1, 2017 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/ 1 Link to comment Share on other sites More sharing options...
drtidmore Posted June 1, 2017 Share Posted June 1, 2017 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. 1 Link to comment Share on other sites More sharing options...
Barney Eaton Posted June 1, 2017 Share Posted June 1, 2017 (edited) 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) 1 Link to comment Share on other sites More sharing options...
harry yarnell Posted June 1, 2017 Share Posted June 1, 2017 I've got good used for $37 postpaid. 1 Link to comment Share on other sites More sharing options...
CMJAnew Posted June 2, 2017 Author Share Posted June 2, 2017 Thanks Everybody 1 Link to comment Share on other sites More sharing options...
DAVES89 Posted June 2, 2017 Share Posted June 2, 2017 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. 1 Link to comment Share on other sites More sharing options...
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