Utilizing a 904574 Nordyne limit switch is standard procedure when diagnosing short-cycling furnaces or systems where the blower fan continues to run long after the burner has shouldered off

yellow for 5 psi

High-Temp Reliability: Rated for 370Vac and frequency-matched for 50/60Hz operations in demanding environments

This 071-03409-004 part is specifically validated for the 496 series loading spring housing

always verify your burner's gas furnace orifice size separately for fuel-specific conversions

Rheem-Ruud 42-19736-02 RELAY Utilizing a 904574 Nordyne limitThe Rheem Ruud 42 19736 02 is a high performance 24V SPDT Relay engineered for precise switching in residential and light commercial HVAC systems. Designed as a genuine OEM repair part, this Single Pole Double Throw relay provides reliable control over two separate circuits, making it an essential component for furnace control boards, fan logic, and air conditioning sequencing. With a robust 24VAC coil and a contact rating typically capable of