Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. Symptoms of a Bad or Failing Connector Hose Heater Control Valve

Symptoms of a Bad or Failing Connector Hose Heater Control Valve

Connector Hose Heater Control Valve

The connector hose heater control valve is the valve that allows hot coolant from the engine to flow into the heater core. The heater core is mounted inside the vehicle, positioned near the blower motor and provides the warmth for hot air to be blown through the vents when the heater is activated. When the heater hose control valve or any of its hoses or connectors fail, it can cause problems for the rest of the cooling system and vehicle. Usually a problem with the heater control valve or any of its associated components will produce a few symptoms that can alert the driver of a potential problem that should be serviced.

No warm air

One of the first symptoms of a problem with a heater hose control valve or any of its associated components is an inoperable heater. If the heater control valve fails or gets stuck, it will not be able to allow hot coolant into the heater core so that the heater can operate. If the heater does not have hot coolant the AC system will not be able to blow hot air, and the front defroster may not work.

Leaking coolant

Another symptom of a problem with the heater control valve or it’s hoses or connectors is a coolant leak. If the housing cracks or breaks due to old age or corrosion coolant will leak out. Old age and corrosion can also cause the heater hoses and clamps to leak as well. A coolant leak at the heater control valve is not only a problem in that it will disable the heater, but it will also compromise the cooling system which can cause the engine to overheat. Coolant leaks can appear as small leaks, spouts of steam, or in more serious cases, large puddles.

The heater control valve and its associated parts are simple components, however, they are very important to the proper functionality of the heater, and any problems with it can both disable the heater as well as cause other problems for the vehicle. If you suspect that your heater control valve or any of its associated components is having an issue, have the vehicle inspected by a professional technician. They will be able to determine if the car needs a heater control valve replacement, or if a different repair is needed.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...


Related questions

Q: Heater won't switch to other settings

The most common problem may be the air mix door motor actuator being bad. There is a pinpoint test to see if it is the controller where you push the buttons or the door actuator on the evaporator case. You...

Q: power steering problem.

Hello. Noise could be a sign of trapped air, low fluid level, or a mechanical fault in the pump. While the system is cold, check the fluid level. If the fluid level is OK, remove the cap and turn the...

Q: how long can it take to change valve cover gaskets on 2003 Lincoln aviator 4.6litre

Hi there. The book time calls for approximately 3.5 hours to complete the replacement of both valve cover gaskets. But this will vary by mechanic, but this is the average book time. If you need to have them replaced, consider...