How do you open a heater control valve?
Tip: While waiting, command max heat from the climate control and turn the fan speed to the highest setting. This will open the heater control valve and allow coolant to flow through the heater core to remove and air from the system.
What to do if your heater control valve breaks?
On a cable operated system, the cable can break or detach from the control levers, leaving the valve in the fully open position. 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.
How to put a shut off value in heater hoses?
I put a valve in both hoses, completlyseals off the heater from the hot water. I got a brass ball valve with a barbed hoes fitting on each end, one hose is 5/8″ the other is 3/4″. I tried the valves from NAPA because they are small, but arter a while I could not turn the handle to shut it off or open it.
Why is my heater control valve not closing?
However, even if the heater control supplies vacuum the mechanical portion of the valve can fail, preventing the heater control valve from closing. Or, rust or sludge in the cooling system can block the valve and prevent it from closing fully.
Tip: While waiting, command max heat from the climate control and turn the fan speed to the highest setting. This will open the heater control valve and allow coolant to flow through the heater core to remove and air from the system.
I put a valve in both hoses, completlyseals off the heater from the hot water. I got a brass ball valve with a barbed hoes fitting on each end, one hose is 5/8″ the other is 3/4″. I tried the valves from NAPA because they are small, but arter a while I could not turn the handle to shut it off or open it.
When do you need to replace a heater control valve?
Never drive an overheating vehicle or an extended period of time. Typically, the mechanical heater control valve is replaced because it is leaking. The mechanical unit can leak coolant or the vacuum diaphragm can rupture causing a vacuum leak which will stop control valve operation.
What should I do if my heater control valve is leaking?
The control valve can be mechanically or electronically activated and is commanded by user input. If the valve is leaking, you may see dried residue close to the color of the system coolant. These are the remnants of some of the dyes and chemicals used in the engine coolant.