11U71 93W93 80W66 77W43 - OEM Lennox Armstrong Ducane Furnace Pressure Switch
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Description
This is a brand new OEM Lennox Armstrong Ducane upgraded Furnace Pressure Switch. It replaces the part numbers listed below.
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:
11U71 93W93 80W66 77W43
Repair Difficulty Level
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