Field Serviceability: Features an adjustable superheat spindle and flare-to-flare connections for streamlined installation and tuning

Universal Compatibility: Supports up to 3 heating and 2 cooling stages

While the regulator itself is robust

This particular York furnace part includes a factory-installed gasket to ensure a pressurized seal against the header box

Trane CNT4990 Pressure Control 320788-704 Field Serviceability: Features an adjustableThe Trane CNT4990 is a high precision HVAC air pressure control switch engineered for critical monitoring in residential and light commercial systems. This OEM Trane replacement part features a fixed set point of 0. 26" WC, making it a vital safety component for sensing draft in inducer fan assemblies and ensuring proper airflow before ignition. With its SPST (Single Pole Single Throw) contact configuration, the CNT4990 provides reliable circuit