HydraMaster

12 volt solenoid valve that is used on some Hydramaster units as a chemical valve or hi temp valve.

The MAC vacuum control solenoids work in conjunction with the temperature controller to operate the exhaust diverter actuator. When not functioning properly the actuator won't open and the unit will often under perform in heating. There are two solenoids employed one as a primary and one as a secondary, it's recommended to change both at the same time.

Repair Kit Old Style Bypass Repair

Starter Solenoid switch.