What happens if you have a bad heater control valve?
What happens if you have a bad heater control valve?
Higher-than-normal temperature gauge readings (from loss of coolant) While a lack of interior heat from a bad heater control valve is a serious enough problem, the real danger from a bad heater control valve is the possibility that enough coolant could leak out to cause your engine to overheat.
How to check the temperature of a heater control valve?
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. If the inlet side is warmer than the outlet side, the valve isn’t opening or opening fully. Remove the vacuum line from the vacuum motor and check for engine vacuum.
What are the features of a rain bird valve?
All Rain Bird valves are designed to work with Rain Bird controllers and other controllers that have a power output sufficient to activate the valve. Your Rain Bird valve offers some simple features you should be familiar with. Note: Some valves have only part of these features. See the diagram above for information on flushing the valves. a.
How does a heater control valve work in a car?
The heater control valve (or hot water valve) opens to allow hot coolant from the engine to flow through the heater core, which heats the air supplied to the passenger compartment. Adjusting the temperature may not change the output from the heater. Valve may leak coolant.
What can cause a heater control valve to fail?
A heater control valve can fail in several ways. Since a vacuum operated valve defaults to the fully open heat-on position when vacuum isn’t applied, a loss of vacuum is the first thing to suspect in a “heat always on” condition. The loss of vacuum can be caused by a break in a vacuum line or a faulty vacuum switch.
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.
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. If the inlet side is warmer than the outlet side, the valve isn’t opening or opening fully. Remove the vacuum line from the vacuum motor and check for engine vacuum.
All Rain Bird valves are designed to work with Rain Bird controllers and other controllers that have a power output sufficient to activate the valve. Your Rain Bird valve offers some simple features you should be familiar with. Note: Some valves have only part of these features. See the diagram above for information on flushing the valves. a.
