What is the Heater Control Valve?
The heater control valve is one of the many components that are in charge of warming the interior compartment. This valve controls the flow of coolant from the engine to the heater core. Most heater control valves are operated in three basic ways. A manual cable, a thermostat type system, or even engine vacuum can control them.
Facts to Note:
The heater control valve cannot be repaired, only changed.
When the valve is changed, a mechanic should examine the other heater hoses, so that they can be changed if need be.
If the heater control valve is contaminated or corroded, the coolant in the system should be flushed when the new valve is fixed.
How to Fix:
Pressure check the cooling system.
Test operation of the valve.
Change the control valve if bad/leaking.
Fill with coolant.
Test operation of the heater.
Since the air and heating system is a closed system, a mechanic won’t be inspecting your heater control valve during routine inspections and services. Instead, keep an eye on your air and heating system, and schedule an inspection if you notice that anything is malfunctioning. If your heater either doesn’t work or won’t adjust, then you possibly have a malfunctioning heater control valve, and you should schedule an inspection.
Common signs indicating you may need to change the Heater Control Valve:
Coolant is leaking.
Heater does not work.
Importance of this service:
If the heater control valve is leaking then you will end up with a loss of coolant, which will eventually cause the car to overheat. A correctly working heater control valve ensures the proper functioning of the heating and AC system.