it prevents heat exchanger damage and hazardous conditions by interrupting the burner circuit if the plenum temperature exceeds specified tolerances

Common Questions What are the symptoms of a failing Lennox 92X30 board

ZR84K-ZR144K

eliminating mounting modifications

making it resistant to thermal expansion and vibration

York S1-025-41020-000 Expansion Valve Els PW 17895 it prevents heat exchanger damageThe York S1 025 41020 000 is an essential OEM 5 Ton Thermal Expansion Valve engineered for heavy duty residential and commercial HVAC applications. Designed specifically for R 22 refrigerant systems, this thermostatic expansion valve (TXV) provides the precision metering required to optimize evaporator efficiency. Featuring 3 8" x 3 8" inlet and outlet connections, the S1 025 41020 000 utilizes a 31" capillary tube and a remote sensing bulb to monitor