Johnson Controls A421ABC-04 Temperature Control Els PW 17895 this direct-fit component eliminates the

this direct-fit component eliminates the diagnostic uncertainty associated with universal relays

Ensure the mounting surface is clean of debris before insertion

an electrical suppressor to mitigate signal interference

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

Johnson Controls A421ABC-04 Temperature Control Els PW 17895 this direct-fit component eliminates theThe 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