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Installation position and function of water heater micro switch

Many people ask what is the function of the micro switch installed in the water heater? First of all, the micro switch is to use the water pressure to push the micro switch to open when you turn on the water heater to control the work of the water heater control panel: high pressure ignition, the solenoid valve opens. (The circuit will be automatically opened when there is water pressure. The circuit will be automatically closed when there is no water pressure)