Question about 2003 Toyota Highlander

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Heating problem Our Highlander has never had a great heating system but lately it seems to be getting worse. The air blows out well, but the air is not hot. Now we have a check engine light that come on, and it is a cooling sensor. Cuold this be a coolant regulator and if it is where could we find it?

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  • gianttoejam Oct 03, 2008

    I have a 2001 with 108000 miles and the 'hot' air is luke warm and frequently turns cold. With winter coming this could be a big problem. Any suggestions?

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I can't solve your problem, but since so many people who own a highlander are have the same types of problems, it seems to me that Toyota should be checking into this problem.

What do you think?
I am going to call my dealer today.

Posted on Sep 04, 2008

  • AnitaD9 Sep 04, 2008

    I called my dealer, just now. He said that the valve needs replaced because the freon is leaking out. When I told him that I had it fixed, he immediately offerd me the Toyota Customer Assistance toll free number. 800-331-4331. Also, my check engine light has been on since 2005.

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Les, it sounds like your blend door actuator has failed, it is a small vacuum operated diaphram up under the dash that controls a flapper that switches between the cool air and heated air. Good news is that it is an inexpensive part, bad news is pulling the dash out to get to it.

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