For intermittent pilot or hot surface ignition systems

Broad Compatibility: Validated for use across several Trane and American Standard HVAC units

mounting hardware and secondary ignition components should be inspected and reused or replaced separately if necessary

Will this spring work with both Natural Gas and Propane applications

the heavy-wall brass construction resists cross-threading and withstands the high temperatures typical of compressor discharge lines

Trane SWT2973 Pressure Switch 319825-402 For intermittent pilot or hotThe Trane SWT2973 Pressure Switch is an essential OEM safety component designed for precise draft monitoring in Trane and American Standard gas furnaces. Engineered for a 24V control circuit, this high performance sensor ensures the inducer motor establishes a proper vacuum before allowing the ignition sequence to proceed. It features a critical setpoint configuration, precisely calibrated to open at 1. 33" WC and close at 1. 52" WC, preventing unsafe