Also referred to as a combustion air switch or draft proving switch. 0.70 IWC on fall. For replacement tubing, order B13-614.
We have a large selection of furnace parts manuals / wire diagrams online. To help you look up your part number by model number. Click on Furnace Parts Breakdowns Collections then use Control and F to search your model number. ctrl+F
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1 Year Warranty on ALL parts!