Furnace Air Pressure Switch – Honeywell Compatible (45" WC PF)

Furnace Air Pressure Switch – Honeywell / Lennox Compatible (.45" WC PF) Condition: Used – Cleaned and Fully Functional Manufacturer: Honeywell Part Numbers: IS22045051F5111 / MP2168 Component Type: Furnace Air Pressure Switch Application: Gas Furnace Draft / Vent Safety Control System Overview: This furnace air pressure switch is a safety device used in residential gas furnaces to verify that the inducer motor is creating proper draft pressure before ignition begins. If the required negative pressure is not achieved, the switch opens the circuit and prevents the furnace from firing, protecting against unsafe venting or combustion conditions. Technical Specifications: Pressure Rating: 0.45" WC PF (Pressure Fall) Voltage: Low-voltage furnace control circuit Switch Type: Negative pressure safety switch Mounting: Tubing connection to inducer housing Connection: 2-wire spade terminals Compatible Furnace Brands Common OEM applications include furnaces from: Lennox Armstrong Air Ducane Trane Key Features: Verifies inducer motor airflow Prevents ignition if venting is blocked Ensures safe furnace operation OEM replacement part Simple two-wire installation Condition: Used - Like new For Sale By: Owner Curbside pick up: Yes Cash accepted: Yes