Description
This is a BRAND NEW Lennox/Armstrong/Ducane Gas Furnace 2-Stage Air Pressure Switch. The Part # is 63W40 (also 63W4001 & Honeywell # 9370VO-HD-0001). One switch is rated at .20" with one hose port and one wiring terminal and the other switch is rated at .40" with two hose ports and two wiring terminals.
Function:
An 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.
Replaces Old Part #s:
63W40 63W4001
Repair Difficulty Level:
Partial List of Units that Use This Item:
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