2005 TOYOTA SEQUOIA
150,000 MILES
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BMATHERLY
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  • 1 POST
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?
Dec 18, 2012 at 6:15 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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KHLOW2008
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Without knowing the cause it woon't be possible to recommend any rectification methods.

Get a scan done to check for trouble codes.
Dec 18, 2012 at 6:48 PM
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MFORD6461
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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
Jan 29, 2014 at 3:33 PM
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KHLOW2008
  • CAR REPAIR CONTRIBUTOR
  • 41,814 POSTS
Which module did you replace?
Was the blower control unit tested for shorting?
Jan 31, 2014 at 4:52 PM