Johnson Controls A421ABC-04 Temperature Control Els PW 17895 this kit ensures the furnace

this kit ensures the furnace shuts down if temperatures exceed safe operating parameters

an electrical suppressor to mitigate signal interference

Common Questions What does the 4-flash code mean on my York furnace

Industrial Durability: Thermal-resistant construction prevents premature coil burnout during continuous duty cycles

OEM Compatibility: Specifically engineered as a drop-in replacement for Lennox 89M9201

Johnson Controls A421ABC-04 Temperature Control Els PW 17895 this kit ensures the furnaceThe Johnson Controls A421ABC 04 is a line voltage, single stage electronic temperature control designed to provide precise switching for HVACR systems. Operating on 120 240 VAC, this controller features a versatile SPDT output relay that manages heating or cooling applications across a wide temperature control range of 40 to 212? F. As the upgraded successor, the A421ABC 04 is a direct replacement for the A419ABC 3, though technicians should verify