The TCV .. thermo control…
The TCV .. thermo control valve regulates and directs coolant to the heating unit and engine. Mine on 2021 Outback failed 2 weeks ago. The intake manifold gasket ($95) is on back order leaving my car waiting for repair for as much as 5 weeks! In my case, the valve is open sending coolant and keeping the engine cold with little heat in the cabin. The car temp gauge does not move. Cruise control, pre collision braking, lane assist and more features are shut off! This valve costs $430 plus around 5 hours of labor. I am covered by extended warranty and still have my older Camry to drive. These thermo control valves are far more sensitive than old style thermostats allowing cars to heat up faster and improve fuel efficiency by a few % points. Subaru has redesigned this part in mid 2021 but not done a recall on previous poor design.