Description
Trane CNT1170 SPST Defrost Control Overview
The Trane CNT1170 is a Single-Pole Single-Throw (SPST) defrost control designed to manage the defrost cycle in heat pump and refrigeration systems. Engineered to Trane OEM specifications, this control ensures accurate temperature-based switching to protect system components and maintain efficient operation throughout the heating season.
Key Operating Parameters
- Switch Type: Single-Pole Single-Throw (SPST)
- Opens At: 70°F — terminates the defrost cycle as the coil warms
- Closes At: 37°F — initiates the defrost cycle when coil temperature drops
- OEM Trane replacement part (SKU: CNT1170)
How It Works
The CNT1170 defrost control monitors coil temperature and automatically opens the circuit at 70°F to end the defrost cycle, then closes again at 37°F to re-engage defrost when frost accumulation conditions return. This precise switching action prevents ice buildup on the outdoor coil, maintaining heat transfer efficiency and protecting the compressor from strain.
Applications
- Trane heat pump systems requiring defrost cycle management
- Outdoor coil frost protection in cold-climate installations
- OEM replacement for failed or out-of-spec defrost controls
Why Choose the Trane CNT1170
- Direct OEM Trane replacement — ensures proper fit and function
- SPST design for simple, reliable circuit switching
- Calibrated open/close setpoints for accurate defrost cycle control
- Helps maintain system efficiency and extend equipment life
- Trusted Trane quality for residential and light commercial applications
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