It is a vital pilot burner part for HVAC contractors servicing non-vented appliances

This valve is supplied without a solenoid coil

When you're out in the field servicing a steam system

this copper-jacketed thermocouple ensures the gas valve remains open only when a consistent pilot flame is detected

York 031-02479-001 Relay Board 320734-701 It is a vital pilotThe York 031 02479 001 Relay Board is a critical OEM replacement component designed for Mustang heating and cooling systems. As a veteran grade HVAC control board, it functions as the central logic unit, managing and directing high voltage electrical signals to ensure precise sequencing and timing of furnace and air conditioning operations. This Mustang control relay board is engineered with integrated circuitry that switches circuits in response to