Nordyne 638251 Furnace Air Pressure Switch IS20101-6124 0.67″ WC used #O29

Up for sale is the actual item style you see in the pictures. This part was removed from a working furnace so it my be dusty/dirty. I don’t know whether it was properly diagnosed, verified, or installed by a properly trained HVAC technician but rest assured that it is a working part that was thoroughly gone through.

MPL-9300-1.05 Furnace Pressure Switch (RA)

This Honeywell SPST pressure switch, model MPL-9300-1.05, is compatible with Nordyne central furnace and air conditioner products. The switch features a 24-volt voltage, a maximum pressure of 0.4 psi, and a connection size of ΒΌ inch. It comes with an OEM mounting bracket and weighs only 2.8 ounces, with dimensions of 5.5 inches in length and 4.5 inches in width. This pressure switch was manufactured in Costa Rica in 2003 and is made of plastic material. It is a great addition for HVAC professionals looking to replace a faulty pressure switch in their clients’ heating and cooling systems.

Air Pressure Switch Replacement Part 632444R MPL93001 for Furnace Safety Device

Replaces Part Numbers: Replaces 632444, 632444R, 632252, MPL-9300-1, MPL93001, MPL-9300-1.74-N/O, 9371DO-HS-0023, CIB624567A, PTMPL-9300, PTMPL9300, CAR632444. Function: This air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.

Air Pressure Switch Replacement Part 632444R MPL93001 for Furnace Safety Device

Replaces Part Numbers: Replaces 632444, 632444R, 632252, MPL-9300-1, MPL93001, MPL-9300-1.74-N/O, 9371DO-HS-0023, CIB624567A, PTMPL-9300, PTMPL9300, CAR632444. Function: This air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.

Air Pressure Switch Replacement Part 632444R MPL93001 for Furnace Safety Device

Replaces Part Numbers: Replaces 632444, 632444R, 632252, MPL-9300-1, MPL93001, MPL-9300-1.74-N/O, 9371DO-HS-0023, CIB624567A, PTMPL-9300, PTMPL9300, CAR632444. Function: This air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.

Air Pressure Switch Replacement Part 632444R MPL93001 for Furnace Safety Device

Replaces Part Numbers: Replaces 632444, 632444R, 632252, MPL-9300-1, MPL93001, MPL-9300-1.74-N/O, 9371DO-HS-0023, CIB624567A, PTMPL-9300, PTMPL9300, CAR632444. Function: This air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.

Air Pressure Switch Replacement Part 632444R MPL93001 for Furnace Safety Device

Replaces Part Numbers: Replaces 632444, 632444R, 632252, MPL-9300-1, MPL93001, MPL-9300-1.74-N/O, 9371DO-HS-0023, CIB624567A, PTMPL-9300, PTMPL9300, CAR632444. Function: This air switch is safety designed to ensure that your inducer motor is running at the proper RPM, and creating the proper vacuum for your furnace to flue safely.