This SPST normally closed switch is engineered to monitor heat exchanger temperatures and break the electrical circuit if the internal temperature exceeds the 190°F open temperature threshold

Always verify the part number against the unit’s data plate and conversion chart before installation

The Lennox 48G22 typically includes a set of standard orifices

This F110-20F Fan Switch is a single-pole

High-Capacity Performance: Supports up to 340

Armstrong Furnace R110000245 Limit Switch This SPST normally closed switchThe Armstrong Furnace R110000245 Limit Switch is a critical safety component designed for high performance HVAC systems, functioning as an automatic reset limit control. This OEM replacement part features a temperature range of 80 140F, ensuring the furnace operates within safe thermal parameters to prevent heat exchanger overheating. Engineered for Armstrong and Air Ease furnaces, this bimetal disc limit switch monitors internal plenum temperatures,