Description
The Trane CNT3782 is an OEM auto-reset carbon monoxide (CO) limit switch rated at 200°F, designed to protect furnace heat exchangers and combustion systems from dangerous overtemperature conditions. When the sensed temperature exceeds the rated setpoint, the limit switch opens the control circuit, shutting down the burner to prevent equipment damage and potential CO hazards. Upon cooling to a safe temperature, the auto-reset function automatically restores normal operation without requiring manual intervention.
This is a direct Trane OEM replacement part, engineered to meet the original equipment specifications for compatible Trane furnace and air handler models. Using genuine OEM components ensures proper fit, reliable performance, and helps maintain system warranty compliance.
Key Features
- 200°F temperature rating for precise overtemperature protection
- Automatic (CO) reset — restores operation once temperature drops to safe level
- OEM Trane replacement part for compatible furnace models
- Opens control circuit on high-temperature condition to shut down burner
- Helps protect heat exchanger integrity and prevent CO-related hazards
- Direct drop-in replacement for simplified installation
Application
- Compatible with select Trane gas furnaces and air handling units
- Installed in the furnace plenum or heat exchanger area to monitor supply air temperature
- Recommended for use by qualified HVAC technicians
Why Choose OEM Trane Parts?
Using genuine Trane replacement components like the CNT3782 ensures your system operates within factory-specified parameters. Aftermarket substitutes may not meet the exact electrical or thermal tolerances required for safe, reliable furnace operation. Trust OEM parts for long-term dependability and peace of mind.
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