This is an SPDT temp control

The "20CI" refers to a 20 PSI Cut-In (close)

Can this replace a shorter thermocouple

maintaining system efficiency and reducing unburned gas buildup

Aaon P51910 Relay Els PW 17895 This is an SPDT tempThe Aaon P51910 Relay is a heavy duty 4PDT (4 Pole Double Throw) electromechanical component manufactured by IDEC, specifically engineered for high cycle reliability in commercial HVAC systems. This 24V AC coil relay serves as a critical interface for Aaon rooftop units (RTU) and air handling systems, allowing low voltage control circuits to manage multiple high load auxiliary functions simultaneously. With its 14 pin plug in design, the P51910