When I turn on the heater and put the temp control dial in the red for heat the AC indicator light goes on and only blows cold, That indicator light can normally be pushed off to stop the AC but it will not turn off. The light will go off if I turn the blower off.
I tried turning the blower off and keeping the temp control in red and driving to see if residual heat might flow through the vents but only cold air flows. The engine temperature is normal. All fuses relating to the heater & AC are ok. Thanks for your input. John
What makes this problem better or worse?
This is a 4Cyl - 4wd - standard transmission (not shown as a "select engine" option
How long has your 2010 Toyota Tacoma had this problem?
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Hey John, sorry to hear about your issue. It sounds like the dial for the temperature control is not responding. This could be a faulty control unit meaning that the control dial itself is bad. There aren't parts for these types of things but you can find them used on eBay. Now there are other possibilities but to fully diagnose the issue you would require some electrical testing from someone familiar with automotive HVAC.
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Alex
