Trane CNT1220 Limit Switch The technical design features a

The technical design features a high-grade EPDM O-ring and a stainless steel pressure pin to maintain a reliable seal against pitting and mineral buildup common in older hydronic loops

This replacement O-ring set is the trade standard for maintaining commercial burner systems and large-scale industrial heating equipment

5" depth and 0

Ensure a uniform stretch across the entire rack and verify that the blower is moving the rated CFM across the resistance heating coil to prevent high-limit tripping

Trane CNT1220 Limit Switch The technical design features aThe 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