Description
The Reznor 104842 Pressure Switch is a genuine OEM safety control component engineered for commercial and industrial Reznor gas fired unit heaters. This pressure switch monitors combustion and draft airflow to ensure that proper venting and induced draft conditions exist before allowing the burner to ignite or continue operation. By detecting the appropriate differential pressure in the combustion air pathway, it helps protect against unsafe airflow conditions and supports reliable, efficient heater performance.
Key Features
- Genuine Reznor OEM pressure switch engineered for combustion airflow safety monitoring
- Verifies proper draft and airflow conditions before burner ignition
- Precision‑manufactured to meet factory specifications for reliable performance
- Helps prevent unsafe operation due to blocked vents or inadequate airflow
- Durable construction suited for commercial and industrial HVAC environments
- Compatible with select Reznor unit heater series (e.g., RA, RAD, RV)






