Extreme Terrain
4x4Wire Trail Talk Forums: Jeep, Toyota, Mitsubishi, Pajero, Isuzu, Kia, 4WD, 4x4, SUV, Off-Road and OutdoorWire Forums


Previous Thread
Next Thread
Print Thread
Rate Thread
HVAC fan is stuck on High!!! #616741 06/20/05 02:58 PM
Joined: Apr 2004
Posts: 93
tucker80 Offline OP
Getting the Wheeling Fever
Hey guys, I don't know if this has ever happened to any of you, but over the weekend I went to visit my dad. I parked the truck on saturday night, had the fan on hi, and shut the truck off. When I got up yesterday morning to move it to go to church, the switch was frozen in the hi position. Tried some WD40 and a few other in a pinch fixes, but nada. It is like it just locked up. I unplugged the fan for the drive home. I am gonna dive in after work today, and just wanted to throw it out there and see if anybody had any tips, or to see if anybody might know whats up. Thanks for any help, or ideas.

Matt


'90 Pickup 22RE 4.30's, 31 STT's, MossyRock Sliders
'90 2wd xtraCab, getting a heart transplant
'88 4Runner with a thrown rod, waiting in the wings
Re: HVAC fan is stuck on High!!! [Re: tucker80] #616742 06/20/05 04:18 PM
Joined: Jan 2000
Posts: 12,153
4Crawler Offline
Web Wheeler
*****
It could be the contacts in the switch welded together. If so, pulling the switch out for a look would say for sure. Might be able to pry the contacts apart and file them clean, or it may need to be replaced.

How to remove the switch? Dunno, never have managed to tear that far into my dash <img src="/forums/images/graemlins/frown.gif" alt="" />

Re: HVAC fan is stuck on High!!! [Re: 4Crawler] #616743 06/20/05 07:39 PM
Joined: Apr 2004
Posts: 93
tucker80 Offline OP
Getting the Wheeling Fever
Thanks for the heads up, 4crawler. I will give her some TLC tonight after work and give an update, and some pics if i find anything interesting.

Thanks again,
-Matt


'90 Pickup 22RE 4.30's, 31 STT's, MossyRock Sliders
'90 2wd xtraCab, getting a heart transplant
'88 4Runner with a thrown rod, waiting in the wings
Re: HVAC fan is stuck on High!!! [Re: tucker80] #616744 06/22/05 09:45 PM
Joined: Apr 2004
Posts: 93
tucker80 Offline OP
Getting the Wheeling Fever
Ok, so I finally wrenched out the old fan switch, it was fried. The tech guy at the toyota dealership said it was one of the worse ones he'd seen. <img src="/forums/images/graemlins/scared.gif" alt="" /> The tech guys said it was a common failure, but was not typical. Got a new switch, they had them in stock because they sell alot of them. <img src="/forums/images/graemlins/rolleyes.gif" alt="" />
$60 bucks later I had the culprete, now I have another question.

I have been testing the new switch for continuity according to the FSM link, and the M2 and Hi settings are not registering, Does that mean the new switch is bad <img src="/forums/images/graemlins/scared.gif" alt="" />, or is there something I'm missing.

Got some good pics of the fouled switch I'll post in a few, and the switch itself is fairly straight forward to remove. I could detail it if anybody is interested.

Thanks again for any input.

Matt

Last edited by tucker80; 06/22/05 11:34 PM.

'90 Pickup 22RE 4.30's, 31 STT's, MossyRock Sliders
'90 2wd xtraCab, getting a heart transplant
'88 4Runner with a thrown rod, waiting in the wings
Re: HVAC fan is stuck on High!!! [Re: tucker80] #616745 06/22/05 11:33 PM
Joined: Apr 2004
Posts: 93
tucker80 Offline OP
Getting the Wheeling Fever
Here are some pics of the fried switch..

the switch
[Linked Image]

another shot
[Linked Image]

Normal position
[Linked Image]

What happens when the plastic gets TOO hot
[Linked Image]

The Fried switch on the inside
[Linked Image]

Just thought you guys might find these interesting. The toy tech said it looked bad, but it was just how they went out.

His words were "When they go they GO!"

Gonna put the new one in this afternoon. Update to follow.


'90 Pickup 22RE 4.30's, 31 STT's, MossyRock Sliders
'90 2wd xtraCab, getting a heart transplant
'88 4Runner with a thrown rod, waiting in the wings

Moderated by  4Crawler, 4x4Wire, kewlynx 







4x4Wire Social:

| 4x4Wire on FaceBook |


OutdoorWire, 4x4Wire, JeepWire, TrailTalk, MUIRNet-News, and 4x4Voice are all trademarks and publications of OutdoorWire, Inc. and MUIRNet Consulting.
Copyright (c) 1999-2019 OutdoorWire, Inc and MUIRNet Consulting - All Rights Reserved, no part of this publication may be reproduced in any form without express written permission
You may link freely to this site, but no further use is allowed without the express written permission of the owner of this material.
All corporate trademarks are the property of their respective owners.

Powered by UBB.threads™ PHP Forum Software 7.7.3
(Release build 20190728)
PHP: 7.4.33 Page Time: 0.006s Queries: 15 (0.004s) Memory: 0.6082 MB (Peak: 0.6893 MB) Data Comp: Off Server Time: 2026-06-21 17:23:20 UTC
Valid HTML 5 and Valid CSS