Heat a/c troubles, diagnostic codes

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Thread: Heat a/c troubles, diagnostic codes

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    Default Heat a/c troubles, diagnostic codes

    2007 Tundra Limited

    My HVAC is having troubles, with a number of symptoms. The driver and passenger sides are blowing hot/cold air with the temperature settings equivalent. The heat keeps putting out way beyond the set temperature. Also, the hvac has begun to forget its digital settings and reset itself on startup. I have looked up and found others with that problem on this forum.

    I have accessed the HVAC diagnostic codes by pressing and holding auto/recirculate at start up. It then delivers three codes, 21, 24, and 46. I have not been able to find online a resource for what these codes mean. I take it 21 is for the solar sensor, but I did the check at night, so that could be it. 24 and 46 I have no idea. Anybody with a thought? I could really use the help.

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    Default Re: Heat a/c troubles, diagnostic codes

    Thanks a million. I really appreciate it.

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