Williams Furnace Company 11A18 Observation Door Cover for Forsaire Direct Vent Furnaces


The 11A18 observation door, also known as a 'peep hole cover assembly', is for use with Forsaire Counterflow Direct Vent Intermittent Pilot models 4007331 and 4007332.

Click here to download the replacement parts lists and exploded view diagrams. Please refer to the appropriate section for your specific furnace.
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