Symptoms of a Bad or Failing Heater Control Valve

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Cost of Replacing a Bad or Failing Heater Control Valve

Common signs include the heater not working, coolant leaking from under the engine, and no voltage across the heater control valve. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Car Heater Control Valve Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2014 Buick LaCrosse $194 $67.92 $126.00 25% $261.42
2014 Honda Insight $162 $91.55 $70.00 18% $199.05
2003 Dodge Ram 2500 $191 $121.08 $70.00 16% $228.58
2009 Audi A6 Quattro $728 $588.46 $140.00 9% $803.46
2008 Mercedes-Benz B200 $292 $145.14 $147.00 21% $370.89
2004 Porsche Cayenne $478 $352.18 $126.00 12% $545.68
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How to Diagnose a Bad or Failing Heater Control Valve?

heater control valve

The heater control valve is a cooling and hvac system component that is commonly found on many road going cars and trucks. The heater control valve is typically mounted near the firewall, and acts as the valve that allows coolant to flow from the engine to the heater core, which is located inside of the vehicle. When the valve is opened, warm engine coolant passes through the valve and into the heater core, so that hot air can be produced from the vehicle’s vents.

When the heater control valve fails it can cause issues with the vehicle’s cooling system, and with the operation of the heater. Usually a bad or failing heater control valve will produce a few symptoms that can alert the driver of a potential issue.

1. Heater doesn’t work

One of the first symptoms of a faulty heater control valve is a heater that fails to produce warm air. If the heater control valve breaks or gets stuck, the coolant flow to the heater core may be restricted or stopped completely. Without coolant flow to the heater core, the heater will not be able to produce warm air for the cabin.

2. Leaking coolant

Another common symptom of an issue with the heater control valve is coolant leaks. 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.

3. Erratic heater behavior

Erratic behavior from the engine is another symptom of an issue with the vehicle’s heater control valve. A faulty heater control valve may not be able to properly control coolant flow to the heater, which may result in problems with operating the heater. The heater may produce hot air, but only at certain times, such as at idle, and the hot air may come and go. A faulty heater control valve may also cause the temperature gauge to behave erratically, rapidly climbing and falling, which will make it difficult to determine the temperature of the engine.

While replacing the heater control generally considered routine maintenance, as a vehicle approaches high mileage it can begin to have issues and require attention. If your vehicle is producing any of the symptoms above, or you suspect that your heater control valve may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the valve should be replaced.

heating
Coolant Service Light
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Recent Car Heater Control Valve Replacement reviews

Excellent Rating


YourMechanic Car Heater Control Valve Replacement Service

Average Rating

4.8/5

Number of Reviews

45

Rating Summary
42
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1
42
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1

Alex

13 years of experience
405 reviews
Alex
13 years of experience
He was very polite and knowledgeable of the work to be done. He kept me informed of the status of my parts.
2006 MERCEDES-BENZ CLS500 - HEATER CONTROL VALVE - MESQUITE, TEXAS

Eduardo

16 years of experience
203 reviews
Eduardo
16 years of experience
Great service. Honest work.
2001 HONDA ODYSSEY - HEATER CONTROL VALVE - PEARLAND, TEXAS

Luis

15 years of experience
61 reviews
Luis
15 years of experience
Great job. Very knowledgeable
1994 TOYOTA CAMRY - HEATER CONTROL VALVE - HACKENSACK, NEW JERSEY

Michael

13 years of experience
379 reviews
Michael
13 years of experience
Michael showed up right on time. He was very knowledgeable and professional. He diagnosed my coolant leaking problem on the first visit, ordered a part, and installed it quickly on the 2nd visit.
2006 NISSAN XTERRA - HEATER CONTROL VALVE - KENNESAW, GEORGIA

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