Nordyne/Miller/Intertherm Pressure Switch (1010775R) (NOT RETURNABLE)

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A pressure switch is also referred to as a combustion air switch or a draft proving switch. The switch closes at -0.20" of WC when the combustion/booster motor runs creating a nega tive air pressure. This model replaces 632332, 632453 and 6323320. M1 Model Furnaces. Show more