and RS1100-72

System Compatibility: Fits professional-grade Lennox GCS24

Most failures result from carbon buildup (sooting) on the electrode or cracks in the ceramic insulator caused by thermal stress

OEM Standards: Genuine 354370 replacement part eliminates the risks associated with generic seals

A loose hub or a stripped setscrew on the 1/2-inch bore often necessitates a full replacement to restore system efficiency

Johnson Controls T26S-22 Thermostat 30067439-890 and RS1100-72The Johnson Controls T26S 22 is a robust line voltage thermostat engineered for high accuracy temperature control in demanding light commercial and industrial HVACR applications. This SPDT thermostat (Single Pole Double Throw) provides ultimate flexibility, allowing for seamless integration into heating, cooling, or year round ventilation systems. Operating within a 5 to 30 degrees Celsius range, the T26S 22 is functionally identical to the T26S 22C