it monitors blower motor performance to ensure the combustion air fan is generating sufficient static pressure before allowing the gas valve to energize

Can this sensor be used for discharge air monitoring

Disconnect the power and perform a resistance (ohms) test at room temperature

Common Questions: How do I know if my 632476R is faulty

McDonnell & Miller 349500 Hook-Up 30067439-890 it monitors blower motor performanceThe McDonnell & Miller 349500, also identified by model number SA159 24, is a specialized lower quick hook up fitting engineered for seamless integration with steam boiler safety controls. This critical component serves as a direct replacement part for the McDonnell & Miller Series 47 and 47 2 mechanical water feeders, as well as the Model 64 A, 42A, 67, and 42S A low water cut offs. Designed for professional installation, it enables a reliable