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.
Where is the heater control valve Honda?
The heater control valve is found in front of the firewall of the vehicle. It may be controlled either by vacuum pressure or electrical signal. A failing heater control valve may not open or only open when the vehicle is at idle.
How can you tell if a heater control valve is plugged?
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 controls the 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.
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.
What happens if you bypass heater control valve?
Can 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.
Where is the control valve on a heater?
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.
What happens when a heater control valve is stuck?
If the heater control valve is stuck closed depriving the heater core of heated coolant, the inlet hose to the heater core will be hot and the outlet hose much cooler. This can be caused by a clogged heater core. A leaking heater core will leak onto the floorboard and result in a sweet humid smell (coolant) coming from the vents while in operation.
Where is the coolant valve on an AC heater?
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. This valve may be normally open, allowing coolant to flow until activated, or normally closed, allowing coolant to flow only when activated.
How does an air conditioner control valve work?
During times when the air conditioner is in use, the heater control valve closes, preventing engine coolant from entering the heater core. The result is less heat in the passenger compartment, allowing the air conditioner to work more efficiently.