Description
The Trane CNT0478 is a factory-specified AUTO (automatic reset) limit switch engineered to protect Trane heating systems from unsafe operating temperatures. Designed as a direct OEM replacement, this limit switch monitors supply-air or heat exchanger temperatures and automatically interrupts the circuit when temperatures exceed the rated threshold, then resets once safe conditions are restored — helping prevent equipment damage and ensuring continuous system protection.
Key Features
- OEM Trane replacement limit switch — SKU CNT0478
- Temperature range: 100–120°F trip point
- AUTO (automatic) reset operation — resets once temperature returns to safe range
- Designed to protect heat exchangers and blower assemblies from overheating
- Direct drop-in replacement for compatible Trane furnace and air handler applications
- Durable construction for long-term reliability in residential and light commercial HVAC systems
Application
The CNT0478 limit switch is intended for use in Trane furnaces and air handling units where factory-specified overheat protection is required. Always verify compatibility with your specific Trane model before installation. Consult the equipment service manual for proper mounting location and wiring procedures.
Why Choose an OEM Limit Switch?
Using a genuine Trane OEM limit switch ensures the correct trip temperature, reset characteristics, and mechanical fit for your equipment — maintaining warranty compliance and peak system safety.
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