The Nordyne 660149R LP Pilot Orifice is a critical #10 (

Stable Output: 27V secondary output accounts for voltage drop in complex control loops

A tripped Modine blocked vent switch typically indicates a restriction in the chimney or vent pipe

these parts are physically and technically identical

The Rheem-Ruud 42-25104-06 Relay is a heavy-duty 24V SPDT NO/NC Relay engineered for precise switching in residential and commercial HVACR applications

Armstrong Furnace R101432-12 Pressure Switch The Nordyne 660149R LP PilotThe Armstrong Furnace R101432 12 Pressure Switch is a critical OEM safety component engineered for precise inducer draft monitoring in Armstrong Air and Allied Air heating systems. Featuring a factory calibrated . 45" WC set point, this SPST (Single Pole Single Throw) switch ensures the combustion blower is generating sufficient negative pressure before allowing the ignition sequence to proceed. As a direct HVAC replacement pressure switch for