Furnace Air Pressure Switch – Honeywell IS22045051F5111 / MP2168

Furnace Air Pressure Switch – Honeywell IS22045051F5111 / MP2168 (.45" WC PF) Condition: Used – Cleaned and Fully Functional Manufacturer: Honeywell Part Numbers: IS22045051F5111 / MP2168 / 02-4878 Product Type: Furnace Air Pressure Switch (Pressure Fall – PF) Pressure Rating: 0.45" WC PF Code / Batch: 0303/A / 55539 System Overview This air pressure switch is a critical furnace safety component that verifies proper airflow created by the inducer motor before ignition. It is a Pressure Fall (PF) switch, meaning: It opens the circuit if negative pressure drops below 0.45" WC Prevents furnace operation in unsafe venting conditions Technical Specifications Pressure Setpoint: 0.45" WC PF Switch Type: Negative pressure safety switch Voltage: Low-voltage HVAC control (typically 24V AC) Connection: 2-wire spade terminals Tubing Port: Standard inducer pressure port connection Compatible Applications Commonly used in furnaces from: Lennox Armstrong Air Ducane Trane Key Features: 0.45" WC calibrated safety switch Ensures proper furnace draft Prevents unsafe ignition conditions OEM Honeywell reliability Easy replacement installation Condition: Used - Like new For Sale By: Owner Curbside pick up: Yes Cash accepted: Yes