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Coleman furnace control module.
Control Board how it works
903429A Nordyne Control Board (M Series Units)
624780 Nordyne Outdoor Ambient Thermistor
3115-3571 OEM 2 timings 3 switch sequencer S1-02435341000
S1-3112-3571 Coleman 3-pole sequencer H1-110 C1-110
S1-025-30899-000 Coleman sight glass