The York S1-025-41336-000 Limit Switch is a critical OEM replacement part engineered for high-precision thermal monitoring in residential and light commercial furnaces

maintaining a consistent footprint for rapid retrofit

It features a broad operating temperature range of 50°F to 86°F and a vertical mounting profile that simplifies field replacement

the W22-AUX ensures reliable signaling for status indication

Field-tested for durability in extreme environments

Tjernlund Products PS1505 Prover Switch 328140-751 The York S1-025-41336-000 Limit SwitchThe Tjernlund Products PS1505 Prover Switch is a critical safety interlock designed specifically for Tjernlund Auto Draft inducers. As a veteran grade fan proving safety switch, it monitors vacuum pressure within the fan housing to verify that the inducer is operating at peak performance before allowing the burner circuit to fire. This SPST air pressure switch features a non adjustable set point of 0. 05" 0. 02" W. C. (increasing vacuum), ensuring