Description
The Trane CNT7659 is an OEM-grade L300F Manual Reset (M/R) Limit Switch engineered to protect heating systems from dangerous overtemperature conditions. Designed as a direct Trane replacement part, this limit switch provides reliable high-limit safety shutoff and requires a manual reset after tripping — ensuring a qualified technician inspects and addresses the root cause before the system is returned to operation.
How It Works
The CNT7659 limit switch monitors supply-air or heat exchanger temperatures and opens the circuit when temperatures reach the L300F trip point (300°F). Because it is a manual reset type, the contacts do not automatically restore once the fault condition clears — a deliberate safety feature that prevents repeated cycling in an unsafe condition.
Key Features
- OEM Trane replacement limit switch — direct drop-in fit for compatible Trane equipment
- L300F rating: opens at 300°F to protect against overheating
- Manual Reset (M/R) design requires technician intervention before resuming operation
- Provides high-limit safety shutoff for furnaces and air handlers
- Durable construction built to Trane OEM specifications
- Helps maintain system safety, efficiency, and equipment longevity
Application
- Trane gas furnaces and air handlers requiring L300F M/R limit switch replacement
- High-limit safety control in residential and light commercial heating systems
Why Choose OEM Trane Parts?
Using genuine Trane replacement components like the CNT7659 ensures proper fit, reliable performance, and compatibility with your existing equipment — protecting both your system and your warranty. Always verify compatibility with your specific Trane model before installation.
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