York S1-025-38948-000 Reversing Valve Coil Bypassing a safety limit is

Bypassing a safety limit is strictly for temporary diagnostic testing by licensed professionals only

Replace the gas regulator spring if you detect permanent set (loss of free length)

it effectively monitors the draft inducer state

The 5H0547510042 is the current manufacturer replacement for the older 5H54751-42 part number and is functionally identical

York S1-025-38948-000 Reversing Valve Coil Bypassing a safety limit isThe York S1 025 38948 000 is a precision engineered 24V Reversing Valve Coil designed for high duty cycle performance in residential and light commercial heat pump systems. Built to the exact specifications of York, Luxaire, and Coleman equipment, this solenoid coil facilitates the critical transition between heating and cooling modes by providing the electromagnetic force necessary to actuate the 4 way reversing valve. Operating on a standard 24V AC