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Internal heater in transit turneo blowing cold air only

I have checked water flow, if I turn the controls manually by removing the control unit I get hot air. what component goes as I have now determined it is either the motor controlunit on the dash or the motor control box mounted on the heater

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Posted on Jan 02, 2017


SOURCE: 2000 Toyota 4Runner Limited Heater

I have almost the same problem, in this case the power windows, power seats and loock those are not working
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Posted on Sep 03, 2008

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SOURCE: 04 tacoma, v6, 4x4, 5

The heater is controlled by that valve - you don't get heat because that valve isn't opened. Take the control cable out of it and try to open the valve.
If it opens and the water flows freely then the problem is in the dash controls unit - more precisely in the rotary temp button (where that cable goes).
If you can't open it then it's clogged and must be replaced.

Posted on Sep 15, 2010

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