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

Utilizing this 3PDT 120V K3 relay ensures that your system maintains its original factory engineering specifications

and NCGM series air handlers

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

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