York S1-7970-3281/A Limit Switch 319852-301 Broad Compatibility: Direct OEM replacement

Broad Compatibility: Direct OEM replacement for both Lochinvar TST2900 and A

Can I use this for multi-speed applications

the Weil McLain 381-800-477 7-inch vent damper is the critical OEM component required to maintain proper draft and combustion efficiency

Common Questions: Is the A-4000-1048 compatible with older A-4000 series setups

This actuator is primarily utilized in Powers HydroGuard XP mixing valves

York S1-7970-3281/A Limit Switch 319852-301 Broad Compatibility: Direct OEM replacementThe York S1 7970 3281 A Limit Switch is a critical safety component designed for precise thermal monitoring in residential and light commercial HVAC systems. This high limit cutout switch features a 145F Open (FOP) and 115F Close (FCLS) configuration, ensuring the furnace heat exchanger remains within safe operating parameters. Acting as a normally closed thermal disc, the S1 7970 3281 A interrupts the burner circuit if airflow is restricted or