The K16FA-36 and K16FA-36H are identical in specifications

provided the system pressures fall within the adaptor's rated limits

Can I use this for both Natural Gas and Liquid Propane

As long as the temperature range (L160-30) and the 3-inch insertion length match your existing part

this relay is built to handle significant inductive and resistive loads commonly found in commercial and residential air handlers and furnaces

York S1-025-35362-000 Limit The K16FA-36 and K16FA-36H areThe York S1 025 35362 000 Limit is a critical safety component designed for precise thermal management in York, Coleman, and Luxaire gas furnaces. This high limit switch is engineered to open at 200F, effectively cutting the burner circuit if the heat exchanger exceeds safe operating temperatures. Featuring a reliable auto reset function, the circuit closes again once the ambient temperature drops to 170F, allowing the system to resume normal cycling.