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My heater won shut off. When is the hot water control valve in the engine compartment shut off?

April 26, 2017compartment CONTROL engine heater hot valve water

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10 Posted

My heater won shut off. When is the hot water control valve in the engine compartment shut off?

1 Answer

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10 Posted

[Response] Vacuum to close the water valve is only applied in max AC mode or when the MCC temperature selector is fully cold. This varies according to the type of control system in the car (MCC, ACC, ECC) and the Volvo OEM service manual should be consulted for details of vacuum signals.