Description
The Trane CNT4320 is a Single-Pole Single-Throw (SPST) differential pressure control engineered for dependable airflow and pressure sensing in commercial and residential HVAC applications. Designed as a genuine Trane OEM replacement part, this control ensures your system operates within safe and efficient pressure parameters — making it an ideal solution for filter status monitoring, airflow proving, and inducer or blower verification circuits.
How It Works
This differential pressure switch responds to changes in air pressure across a sensing point. When the pressure differential reaches the opening set point of 0.15″ W.C., the switch activates (opens). It resets and closes at a pressure differential of 3″ W.C., providing a reliable switching action that protects equipment and confirms proper airflow conditions.
Key Features
- Genuine Trane OEM replacement part — SKU CNT4320
- SPST (Single-Pole Single-Throw) switching configuration
- Opening set point: 0.15″ W.C. — activates at low differential pressure
- Closing set point: 3″ W.C. — resets at higher differential pressure
- Suitable for airflow proving, filter monitoring, and blower/inducer verification
- Built for long-term reliability in demanding HVAC environments
- Direct OEM replacement for compatible Trane systems
Typical Applications
- Airflow proving in furnaces and air handlers
- Filter status and clog detection circuits
- Draft inducer and blower proving
- Safety interlock circuits requiring differential pressure confirmation
Why Choose the Trane CNT4320?
As a direct OEM component, the CNT4320 is manufactured to Trane’s exacting quality standards, ensuring a precise fit and reliable performance in compatible equipment. Using genuine OEM parts helps maintain system warranties, reduces callbacks, and delivers the consistent switching accuracy that HVAC professionals depend on.
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