This version of the ESPis the correct part for any model made after 2008.This updated ESPhas red wires, as opposed to the previous probes which could have had black, yellow, or white wires. New Circuit boards are now sensing thecondition of the differential pressure switch. (FIG 4)

Notes for ordering replacement parts:

• If you need a new probe: Order to match your existing probe. Red= #3-20-00844
• Black, White, or Yellow Probe: Order the black Probe.
• If you need a new board: Order using the part numbers included here.
• If installing on a unit with an old probe = Dipswitch #5 OFF.
• With new probe= Dipswitch #5 ON.