Heater control?

My 2010 seems to throw a lot of heat into the cabin even when the temp control is max cold. Engine operating temps are normal and I have all blower motor speeds.

Is there a valve that controls the flow of hot water from the engine into the cabin or heater core?

 

I am having the same problem in my 2013 crew with the ac/heat control off.

 

Not on 2nd gens, coolant circulates through the heater core at all times.

Make sure your blend door actuators are working properly.
https://www.tacomaworld.com/threads/2nd-gen-information-diagnostics.784008/

 

My multimeter is down and I am not able to test voltages but the blend door works and both drives in the actuator temp and defrost/heat/floor areas move through their full ranges. It would seem that the controls are working correctly but still having no effect on the cabin temp.

It is a 4.0L V6, 4WD, crew cab w/ a long bed & 145k miles.

 

Is your A/C system working?

 

have you seen the door(s) move or just the control arms
doors could be detached from the shaft(s) or chewed through by rodents

 

Yes the A/C seems to work and the grated door with the foam back moves open and closed when the panel controls are moved.