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The heater will not turn off, cannot change.

Tiny
BMATHERLY
  • MEMBER
  • 2005 TOYOTA SEQUOIA
  • 150,000 MILES
The heater will not turn off, cannot change temp setting, or fan speed. Is this a simple repair or will I need to a shop?
Tuesday, December 18th, 2012 AT 6:15 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Without knowing the cause it woon't be possible to recommend any rectification methods.

Get a scan done to check for trouble codes.
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Tuesday, December 18th, 2012 AT 6:48 PM
Tiny
MFORD6461
  • MEMBER
  • 1 POST
I had the same problem no codes. Tested power at connectors has battery voltage. Replaced module still same problem connect to scan tool actuated the blower motor. Blower motor comes on and showed it increasing on display but still cannot control it at knobs
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Wednesday, January 29th, 2014 AT 3:33 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Which module did you replace?
Was the blower control unit tested for shorting?
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Friday, January 31st, 2014 AT 4:52 PM

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