Common Questions Is this orifice compatible with both Natural Gas and Liquid Propane systems

70"wc SPST pressure switch is factory-calibrated to ensure the draft inducer motor is moving sufficient combustion air before allow the ignition sequence to proceed

Its energy-limiting design is intrinsically safe

For contractors performing boiler maintenance or emergency repairs

Nordyne 01-0843 Sequencer Common Questions Is this orificeThe Nordyne 01 0843 Sequencer is a critical OEM replacement part engineered for staged heating control in electric furnaces and air handlers. This HVAC heat sequencer is designed to manage the timing of heating elements, preventing high inrush current and ensuring the blower motor operates in synchronization with the heat strips. Featuring a 1 110 second On 1 110 second Off timing, it provides precise thermal expansion disk activation to maintain