Description
Trane CNT7188 Hi-Limit Switch Overview
The Trane CNT7188 is an OEM hi-limit safety switch designed to protect HVAC equipment from overheating conditions. When supply or heat exchanger temperatures reach the trip threshold, this limit switch opens the circuit to shut down the heating system — preventing damage and ensuring safe operation. Once temperatures fall back to the reset point, the switch closes and normal operation resumes.
Key Specifications
- Part Number: CNT7188
- Type: Hi-Limit Temperature Switch
- Open (Trip) Temperature: 140°F
- Close (Reset) Temperature: 110°F
- OEM Trane Replacement Part
Features & Benefits
- Genuine Trane OEM component for assured fit and performance
- Automatic reset design — closes at 110°F once system cools down
- Provides critical overheat protection for furnaces and air handlers
- Helps prevent heat exchanger damage and potential safety hazards
- Direct drop-in replacement for compatible Trane systems
Application
The CNT7188 hi-limit switch is used in Trane furnaces and heating systems as a primary safety control. It monitors operating temperatures and interrupts the heating circuit if unsafe temperature levels are detected, protecting both the equipment and the occupants of the building.
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