Trane CNT0674 v 321894-706 Durable Construction: Zinc-plated housing and

Durable Construction: Zinc-plated housing and high-quality diaphragm ensure long-term performance in demanding HVACR environments

and rotation direction match the OEM specifications

Incorporating a non-bleed design

Always verify the part number in your service manual or contact our team for a compatibility check

Trane CNT0674 v 321894-706 Durable Construction: Zinc-plated housing andThe Trane CNT0674 is an industrial grade 170 210F AUTO Limit Switch designed for high performance temperature regulation in forced air systems. As a SPST N C (Single Pole Single Throw, Normally Closed) safety control, this component is critical for preventing heat exchanger overheating. The switch is calibrated to open at 210F, effectively interrupting the burner or heating circuit when thermal limits are exceeded, and automatically resets when