Improved Answer
Actually it is located lying loose on top of the RH valve cove,r spliced into the heater hose. But this valve only controls the heater in HEAT mode and has no control over the A/C whatsoever
Behind the dash on the passenger side.
Inside the heater/ac unit close to the main unit.
on the back side of the heater control panel
Behind the heater core in the HVAC assembly. The assembly is behind the radio.
The air conditioner or heater continually runs.
the answer is air conditioner
The temp blend door. It is electrically controlled by an actuator. It is located behind the dash assembly.
BIOSPHERE
If your heater is a heat pump , then yes.
Heated oxygen sensor heater circuit malfunction (bank 1, sensor 1): Open or short in heated oxygen sensor heater circuit Heated oxygen sensor heater malfunction (Haynes Repair Manual)
heater resistor burnt out! Located under glovebox near heater motor.(held in with 2 screws) 4 to 6 wires coming from the resistor.
Newer oxygen sensors are heated for accuracy. If the heater element goes bad the oxygen sensor doesn't work and needs to be replaced. If you have an oxygen sensor heater malfunction, it just means that the oxygen sensor has failed.