this differential pressure switch acts as a primary safety mechanism to verify proper combustion airflow before allowing the ignition sequence to proceed

Technical Specifications & HVAC FAQ

the internal disc has likely failed and requires replacement

The Trane FLRQB5AH23M11 Filter is an OEM genuine replacement media designed for professional HVAC service technicians maintaining Trane QuikBox cabinets and American Standard TFM Perfect Fit housings

as field contractors often find that matching the exact microfarad rating is critical for maintaining efficiency and preventing premature winding failure in condensate pump motors and blower assemblies

Fireye 72DUV1 Amplifier 323269-701 this differential pressure switch actsThe Fireye 72DUV1 Ultraviolet Amplifier is a field proven, solid state plug in module designed for Series D burner management controls. Engineered for high demand industrial environments, this UV flame amplifier processes signals from non self checking ultraviolet scanners, including the Fireye UV1A3, UV2, and 45UV3 series. By converting the UV radiation from a flame into a consistent DC voltage, the 72DUV1 ensures that your flame safeguard system