The Resideo DP2020B5039 PowerPro Definite Purpose Contactor is a reliable 2-pole HVAC contactor designed for high-cycle applications in air conditioning

Ensures accurate flame signal detection to prevent nuisance service calls and system lockouts

and Carrier

OEM Compatibility: Specific physical and electrical properties ensure direct replacement for legacy Protech and Rheem model numbers

York S1-025-26339-001 Limit Switch The Resideo DP2020B5039 PowerPro DefiniteThe York S1 025 26339 001 Limit Switch is a primary safety component engineered for precise thermal monitoring in residential and light commercial forced air systems. This 100 250F auto limit switch features an automatic reset mechanism, designed to break the 24V control circuit if the heat exchanger plenum exceeds the calibrated 250F threshold. As a critical furnace high limit sensor, it prevents thermal stress and potential heat exchanger cracks by