- 1 Where is the heater control valve located?
- 2 How do I know if my heater control valve is bad?
- 3 What happens when a heater control valve is bad?
- 4 What would happen if the heater control valve was stuck closed?
- 5 Why is my car blowing cold air when the heater is on?
- 6 Can you bypass a heater control valve?
- 7 How much does it cost to replace a heater control valve?
- 8 How do you test a heater valve?
- 9 Do I need a heater control valve?
- 10 What is a heater control valve?
- 11 How can you tell if you have a bad heater core?
- 12 Will a bad heater control valve cause overheating?
- 13 How hot is the air from a car heater?
- 14 How expensive is it to replace a heater core?
- 15 How do you fix a heater core leak?
Where is the heater control valve located?
The heater control valve allows the flow of coolant through the heater core to be controlled and switched on and off without affecting the operation of the rest of the cooling system. 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.
How do I know if my heater control valve is bad?
Here are some of the warning signs of a bad heater control valve:
- No heat comes out.
- Heat is always on and you can’t turn it down.
- Heater operates erratically, putting out more or less heat without any control changes.
- Coolant leaks.
- Low coolant level.
- Higher-than-normal temperature gauge readings (from loss of coolant)
What happens when a heater control valve is bad?
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.
What would happen if the heater control valve was stuck closed?
The heater will fail to produce warm air if the control valve is stuck closed, leaking or disconnected from the heater control. If the hose connected to the engine is warm, but the hose from the valve to the heater core (the hose that goes into your car) is cooler, the valve is in the closed position.
Why is my car blowing cold air when the heater is on?
Problems with the vehicle’s heating system can be either no air or only cold air coming out of the heating system. A car heating system blowing cold air can be due to a faulty thermostat, low coolant fluid level, malfunctioning heater core, a leaking cooling system, or problems with heating controls and blend door.
Can you bypass a heater control valve?
Heater control valve bypass is not standard on vehicles; it is a modification. When bypass hoses are installed, the coolant in your car will always be circulating through the heater core – that means that if the core starts leaking, you won’t be able to turn it off.
How much does it cost to replace a heater control valve?
The average cost for a Heater Control Valve Replacement is between $180 and $202 but can vary from car to car.
How do you test a heater valve?
How to test a heater control valve. Adjust the heat to the full on position with the engine at operating temperature. Then check the temperature of the hose on the inlet and outlet sides of the heater control valve. The inlet and outlet hoses should be the same temperature.
Do I need a heater control valve?
You turn on the heater when it’s cold and warm air blows in at you. That’s why it is surprising for some people to learn that the heater control valve is a necessary part of how the heater works because it allows coolant to pass from the engine itself through the car heater where it’s able to warm you up.
What is a heater control valve?
The heater control valve (sometimes called the hot water valve) is used to control the rate at which coolant flows through the heater core. The valve is located on the heater inlet hose. Manually operated systems may use a cable, a vacuum motor or an electric solenoid to operate the valve.
How can you tell if you have a bad heater core?
Five Signs Your Car’s Heater Core Is Going Bad
- Fog Inside Your Car. Two things could be going on if you have fog inside your car.
- Sweet Smells in the Car. The sweet smell in your car might not be your perfume or the donuts you’re taking to work.
- Constant Engine Coolant Loss.
- Cold Air in the Cabin.
- Cold Cabin/Hot Engine.
Will a bad heater control valve cause overheating?
Another symptom of a problem with the heater control valve or it’s hoses or connectors is a coolant leak. 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.
How hot is the air from a car heater?
Although many vehicles deliver a toasty 135° to 155°, 115° to 120° is acceptable. If the air temperature is okay but airflow is weak, the problem is the blower or a dashboard ductwork problem.
How expensive is it to replace a heater core?
Replacing the heater core can be an expensive job, and usually costs between $564 – $927 for parts and labor. The parts aren’t particularly expensive, normally costing $80 – $234, but the location of the heater core means that labor costs tend to be quite high.
How do you fix a heater core leak?
Fixing a leaking heater core will always be much easier than replacing one. Since it is only a small leak in the heater core, we recommend simply sealing that leak and leaving your heater core in place. You can do this by simply by adding BlueDevil Pour-N-Go to your vehicle’s radiator when your vehicle is cold.