Question about 1987 Toyota 4Runner

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Heater control slider broken, need heat for winter

Something broke inside the heater control on the dash, slider doesn't catch anything to make the heater core turn on anymore. My mechanic told me that I could possibly bypass that control and just set it to full on for the winter, by changing a switch(?) under the dash near the fuse box or in the motor near the heater core. I'm looking for a pic or diagram that could show me what to look for and how to set it to full on. thanks

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Try this: Go out to the vehicle, and open the hood. In the center of the engine compartment, mounted to the firewall, is the heater valve. You can't miss it, it has two hoses and a cable connected to it. If the slider on the dash is doing nothing, the cable may be off of the valve arm, slip it back on & retry it.... If the cable is not off, detach it from the arm, & move it in & out of the cable housing; the heat control on the dash should move. If it does not move, the cable is bad.
What you can do: Just move the arm that the cable connects to on the heater valve the other direction, to to allow the hot water pass thru the valve, and into the heater core.
You can run it like this all winter.
Hope this helps, and thanks for choosing FixYa.
Please feel free to post back if you have any questions regarding this solution.

Posted on Nov 06, 2008

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