clogged filters

3" WC applications across those equipment lines

Comprehensive Rebuild: Includes the quad ring

reducing mechanical stress on the primary heating assembly and gas valves

ensuring precise contact closure and opening cycles to prevent line-side surges during startup

Trane CNT1220 Limit Switch clogged filtersThe Trane CNT1220 (officially updated to CNT01220) is a high limit thermal safety control engineered for precise HVAC over temperature protection. Designed as a direct OEM replacement part, this 160F auto limit switch monitors the supply plenum temperature to prevent heat exchanger damage or unsafe operating conditions. Utilizing a normally closed SPST (Single Pole Single Throw) contact configuration, it interrupts the gas valve or heating circuit