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The McDonnell & Miller 312200 Gasket is a critical replacement valve bracket gasket engineered specifically for Series 21
such as a clogged filter
Precision Threads: Features 1/2" SAE 45
Is the S1-024-35596-000 an auto-reset or manual-reset switch
York S1-2940-3571 Sequencer The McDonnell & Miller 312200The York S1 2940 3571 Sequencer is a critical component for managing the staging of electric heating elements and blower motors in residential air handlers and furnaces. As an authentic Source 1 replacement part, this electric heat sequencer ensures proper timing intervals, preventing simultaneous high amperage draws that could lead to circuit breaker trips. The York S1 2940 3571 utilizes a thermal element to trigger internal switches, typically