Where is the coolant valve on an AC heater?
Where is the coolant valve on an AC heater?
It may be located on the inlet or the outlet port of the heater core and activated by a cable, electronic control, or a vacuum signal. This valve may be normally open, allowing coolant to flow until activated, or normally closed, allowing coolant to flow only when activated.
How does a heater control valve work in a car?
It uses heated engine coolant to provide heat to the passenger compartment. A heater control valve controls the amount of coolant flowing through the heater core. It’s not used in all heater systems, as some manufacturers allow coolant to flow through the heater core any time the engine’s running.
How does an air conditioner control valve work?
During times when the air conditioner is in use, the heater control valve closes, preventing engine coolant from entering the heater core. The result is less heat in the passenger compartment, allowing the air conditioner to work more efficiently.
What causes coolant to leak out of a heater?
Over time the heater control valve can wear out and crack, which will cause coolant to leak from the valve. Heater control valves can also leak from excessive corrosion from contact with old or contaminated engine coolant.
The heater control valve (or hot water valve) opens to allow hot coolant from the engine to flow through the heater core, which heats the air supplied to the passenger compartment. Adjusting the temperature may not change the output from the heater. Valve may leak coolant.
Why is my heater control valve leaking coolant?
Over time the heater control valve can wear out and crack, which will cause coolant to leak from the valve. Heater control valves can also leak from excessive corrosion from contact with old or contaminated engine coolant. Usually a leaking control valve will have to be replaced in order to repair the leak.
What can you do with a bad heater control valve?
By adjusting the heater control valve, you can allow more or less heat into your car’s interior. The heat can be used to keep you and your passengers warm during cold weather, to clear your windows of ice, snow, or condensation, or both. Some vehicles use a blend door, which is a motorized partition between the heater and the fresh air/AC systems.
What is the average rating of a heater control valve?
Average rating from 129,829 customers who received a Vehicle Engine Cooling Inspection. The heater control valve is a cooling and hvac system component that is commonly found on many road going cars and trucks.
