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
2005 Nissan Sentra $175 $105.33 $70.00 17% $212.83
2012 GMC Yukon $148 $71.06 $77.00 21% $189.31
2010 Buick Allure $188 $61.60 $126.00 26% $255.10
2014 Acura TL $147 $77.16 $70.00 20% $184.66
2007 Land Rover Range Rover $500 $373.77 $126.00 11% $567.27
2005 Jaguar Vanden Plas $364 $258.69 $105.00 13% $419.94
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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.

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Recent Car Heater Control Valve Replacement reviews

Excellent Rating


YourMechanic Car Heater Control Valve Replacement Service

Average Rating

4.6/5

Number of Reviews

36

Rating Summary
33
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1
33
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1

Jonathan

32 years of experience
172 reviews
Jonathan
32 years of experience
Jonathan was right on time. He was very polite and knowledgeable. He finished the work in a timely manner. And he was sure to leave everything cleaned up. I would definitely recommend him!!
2013 FORD ESCAPE - HEATER CONTROL VALVE - ST. LEO, FLORIDA

Michael

13 years of experience
312 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

Peter

40 years of experience
972 reviews
Peter
40 years of experience
Peter as always, was professional, arrived early, and began work immediately. Although there were parts unavailable at the time of appointment due to reasons beyond control, Peter was able to do a considerable amount of preparation work, location of alternative problems previously discussed, and put together a plan of action to be completed This wednesday, at the next appointment.
2001 BMW 740IL - HEATER CONTROL VALVE - PHOENIX, ARIZONA

Noe

33 years of experience
507 reviews
Noe
33 years of experience
Noe is friendly, accommodating, professional, and I greatly appreciate that he explained everything clearly, and gave me options on how to move forward with repairs. He is also great at communicating, scheduling, and is very timely. I have continued to book Noe for other repairs.
1991 JEEP CHEROKEE - HEATER CONTROL VALVE - SEATTLE, WASHINGTON

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