HVAC Fan and heated seats not functioning
Thread Starter
TECH Resident
iTrader: (1)
Joined: May 2008
Posts: 800
Likes: 1
From: Minnetonka,MN or Fargo
HVAC Fan and heated seats not functioning yesterday on the way to work went to turn on the heated seat and fans and neither work, no lights on the controls, during lunch they worked, then on the way home they didn't again. i'm going to look into it just wondering if anyone else has had a similar issue.
TECH Fanatic
Joined: Jun 2007
Posts: 1,316
Likes: 3
From: Dolla$ , TX
What do you mean by , "Fans", the word, "Fans" implies more then one, but there is only 1 HVAC Fan.
I'm going to assume you mean the, "HVAC Fan" and both driver and passenger heated seats would not work. With that said, both of those items are on completely different ," Power and ground circuits". BUT, they both share needing to communicate with the HVAC Control Module to function correctly.
There is a seperate module for the Heated seats, BUT, The hvac module is what ACTUALLY tells the Heated seat module to turn on. SO the likely culprit is the HVAC Module itself,
1 or 3 things has happened or is happening
1:The HVAC Control module some how lost its power feed (Fuse, poor connection, open"Cut" wire)
2:The same as 1, except for a ground wire, minus the fuse of course.
3: The HVAC module glitched or is failing.
I'm going to assume you mean the, "HVAC Fan" and both driver and passenger heated seats would not work. With that said, both of those items are on completely different ," Power and ground circuits". BUT, they both share needing to communicate with the HVAC Control Module to function correctly.
There is a seperate module for the Heated seats, BUT, The hvac module is what ACTUALLY tells the Heated seat module to turn on. SO the likely culprit is the HVAC Module itself,
1 or 3 things has happened or is happening
1:The HVAC Control module some how lost its power feed (Fuse, poor connection, open"Cut" wire)
2:The same as 1, except for a ground wire, minus the fuse of course.
3: The HVAC module glitched or is failing.
