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the York S1-7990-3591 is a critical OEM furnace limit switch designed for precision thermal monitoring
Check for a clogged air filter
How do I test the Trane SEN1159 in the field
or panel mounting configurations
Broad Compatibility: Optimized for use with most modern refrigerants
Heil Quaker ICP 1320363 Limit Switch the York S1-7990-3591 is aThe Heil Quaker ICP 1320363 Limit Switch is a critical OEM furnace safety control engineered for high limit protection in International Comfort Products (ICP) heating systems. This auto reset limit switch features a calibrated opening range of 175F to 195F, designed to interrupt the burner circuit if the heat exchanger temperatures exceed safe operating parameters. As a genuine ICP replacement part, it ensures the precise thermal response required to