What causes an indicator lens to become unreadable

and White-Rodgers models

OEM Durability: Constructed to York technical specifications for better resistance to thermal fatigue compared to generic after-market switches

Industrial-Grade Construction: Features high-temp insulation and robust 12-pin terminal housing to prevent brittle failure in the heat plenum

For deep or horizontal wells

Lennox 17J56 Flame Sensor What causes an indicator lensThe Lennox 17J56 Flame Sensor is a critical OEM replacement part engineered for precise flame rectification in residential and light commercial Lennox furnace units. Also identified by part number 17J5601 and catalog number T6 2108, this flame sensing rod utilizes a high grade Kanthal sensor and a glazed L 5 steatite insulator to ensure robust electrical continuity even under extreme thermal stress. In a standard sequence of operation, the integrated