though a compatible sealant can be used on the MPT side to ensure a leak-free pipe thread joint

often accompanied by a specific diagnostic flash code on the control board indicating "low flame signal

It is finished in a classic white that matches the standard casing of modern White-Rodgers digital thermostats

Thermal Protection: Prevents heat exchanger fatigue and component overheating by maintaining strict 150°F maximum limits

York S1-025-29759-001 Limit Switch though a compatible sealant canMaintain the operational integrity of your heating equipment with the York S1 025 29759 001 Limit Switch. This high reliability Source 1 OEM replacement part is engineered for precision thermal monitoring in York, Coleman, and Luxaire furnaces. Operating as a critical safety component, this auto reset limit switch features a specialized 100 160F temperature range, ensuring the system interrupts the burner circuit if internal heat exceeds safe