Description
Trane CNT4693 Low Pressure Control
The Trane CNT4693 is an OEM low pressure control designed for use in Trane HVAC and refrigeration systems. This pressure switch provides reliable low-side circuit protection by monitoring refrigerant pressure and interrupting the circuit when pressure falls outside safe operating limits — helping prevent compressor damage and ensuring system longevity.
Key Specifications
- Brand: Trane
- Part Number: CNT4693
- Type: Low Pressure Control / Pressure Switch
- Close Set Point: 8 PSI
- Open Set Point: 25 PSI
Features & Benefits
- OEM Trane replacement part for precise fit and function
- Protects compressor from low refrigerant pressure conditions
- Automatic reset operation based on pressure recovery
- Designed for compatibility with Trane residential and light commercial equipment
- Helps maintain system efficiency and prevents costly compressor failures
Application
The CNT4693 low pressure control is used in Trane air conditioning and heat pump systems as a safety device on the low-pressure side of the refrigerant circuit. When suction pressure drops to the close set point of 8 PSI, the switch opens the control circuit, shutting down the compressor. The switch resets (closes) when pressure recovers to 25 PSI, allowing normal operation to resume.







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