Maxitrol TS394 3B 48FQ Sensor Els PW 17895 The Lennox 97H76 Damper Door The Lennox 97H76 Damper Door Spring is a critical mechanical component designed to provide precise tension and return force for damper assembly operations within commercial and residential HVAC systems the 19002 is the definitive 90 63 relay cross reference and is designed to replace that specific series across most residential and light commercial compressor brands Robust Construction: Features a corrosion resistant stainless steel sheath sensor for long term deployment in harsh HVACR environments 000 ohm RTD (Resistance Temperature Detector) provides the thermal sensitivity required for Selectra Series 92 and 94 systems