The national cost for a heater control valve replacement in 2023 is between $87 and $447 with an average of $229

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POPULAR VEHICLES

National average cost of a a Heater Control Valve Replacement
for popular vehicles:

Car Model

Avg. cost

$50

What is a heater control valve and how does it work?

A heater control valve (sometimes referred to as a hot water valve) is a component of both the heating and air conditioning (HVAC) system and the engine cooling system. The device diverts some of the hot coolant (antifreeze) from your engine, through a heater hose, and to the heater core inside the passenger compartment. The heater core absorbs heat from the engine coolant and a fan blowing through the heater core pushes warm air through the cabin vents.
The heater control valve moderates the amount of heat blowing into the cabin in response to your selections on the climate controls. When you choose the heat function, the valve opens to allow coolant into the heater core and you get warm air. When you turn off the heat, or turn on the AC, the valve remains closed.

COMMON SYMPTOMS

How do I know if my vehicle needs the heater control valve replaced?

There are a number of signs that the heater control valve on your vehicle is not working as it should, including:

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HOW IS THIS SERVICE PERFORMED?

How is a a Heater Control Valve Replacement done?

Starting with a cool engine, a technician will follow these general steps to replace a heater control valve on your vehicle:

Block the flow of coolant to the heater control valve or drain the coolant from the system
Unclamp the heater hoses from the valve and dislodge the hoses
Disconnect the wire harness plug from the valve assembly
Unfasten the heater control valve and remove it from the vehicle
Install the new valve and reconnect the hoses
Reattach the wiring
Top off or replace the engine coolant
Bleed the cooling system of air (this usually requires special equipment, procedure, or both)

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