Temperature Controls & Related Components for 1991 Toyota Pickup

Fits 4Runner, TruckHeater Control Valve - Repair or ReplaceA Heater Control valve diverts hot water (Coolant, or antifreeze) from the radiator into the Heater core in your vehicle?s cabin, resulting in soothing warm air. If your heat has stopped working, your Toyota may require a Replacement Heater Control valve. From 03/1989. For Primary HVAC.