Honeywell / Tridelta Dual Furnace Air Pressure Switch

Dual Furnace Air Pressure Switch Assembly – Honeywell / Tridelta BA20123 (B4057, BA20173) Condition: Used/like new Manufacturer: Honeywell (Tridelta Industries Inc.) Part Numbers: BA20123, BA20173 Assembly Code: 4672831 / 46739002 Electrical Rating: 24 VAC, 50/60 Hz Switch Configuration: Dual Negative Pressure (Vacuum) Switches Mounting: Factory dual bracket, labeled “BURNER ENCLOSURE” Ports: Two pressure inlets with shared rubber hose connection (included) Key Specifications: Dual diaphragm design for high and low pressure sensing Each switch individually calibrated for furnace safety and performance Normally open; closes on pressure rise Used to verify inducer blower or vent system operation 1/4" male quick-connect terminals Metal mounting bracket with alignment holes for direct OEM fit Typical Applications: Honeywell & Tridelta OEM furnace assemblies Used in Carrier, Lennox, Goodman, and Amana high-efficiency furnaces Provides dual pressure verification for combustion safety Compatible Replacement Models: Honeywell BA20123, BA20173 Tridelta FS6001, FS6002 (verify pressure set points) OEM furnace part numbers 4672831 / 46739002 Typical Pressure Ratings (approx. reference): Switch 1: 0.90" WC Close Switch 2: 1.50" WC Close (verify from label if available — readings may vary slightly by furnace model) Condition: Used - Like new For Sale By: Owner Curbside pick up: Yes Cash accepted: Yes