Description
The Trane CNT4990 is a genuine HVAC air pressure control switch designed to monitor airflow and activate electrical circuits when a specific pressure threshold is reached. With a 0.26 inch water column (WC) rating and SPST configuration, this switch ensures safe and reliable operation in residential and light-commercial heating and cooling equipment.
Key Features
- 0.26 WC Pressure Setting: Calibrated to trigger at 0.26 inches of water column, ideal for inducer fans and safety control applications.
- SPST Switch Design: Single-pole, single-throw design provides simple and reliable open/close switching for control circuits.
- 24 Volt Control Rating: Compatible with standard HVAC low-voltage systems, rated for approximately 28 VA at 24 volts.
- Secure Connector and Mounting Bracket: Includes a positive connector and bracket for easy and professional installation.
- Durable Construction: Compact and rugged design ensures long-term use in blower housings and pressure-sensing locations.






