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the 42S-HD is a head mechanism only
Built for the rigors of high-cycle operation
which often results in cabinet rust and ceiling stains
This kit is commonly found in 15-17
Carrier HK06NB010 Pressure Switch 320720-756 the 42S-HD is a headThe Carrier HK06NB010 Pressure Switch is a factory authorized OEM safety component designed specifically for secondary heat exchanger monitoring and draft inducer verification in high efficiency gas furnaces. Rated at a fixed 1. 18" WC trip point, this SPST (Single Pole Single Throw) switch ensures the combustion blower is moving sufficient air to safely vent flue gases before the ignition sequence initiates. Constructed with a 1 4" barb connection
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