Is this valve normally open or normally closed, where 'normal' is the state in which there is no vacuum applied to it, such as when the engine is off or when the heat lever is not on full cold (e.g., when on full cold, vacuum closes the valve and stops the flow)?
October 2, 2024 12:20 AM
If the heater is off, it is normal to be closed.
October 3, 2024 11:45 AM