Reznor 104842 Pressure Switch Els PW 17895 and measure the flame rectification

and measure the flame rectification signal in microamps (µA) using a multimeter in series with the sensor wire

Always verify the cross-reference for the 47-21900-16 part number

How do I test the Trane SEN1159 in the field

The 20-micron filtration ensures that even the smallest copper oxides and solid contaminants are trapped before they reach the metering device

Reznor 104842 Pressure Switch Els PW 17895 and measure the flame rectificationThe Reznor 104842 Pressure Switch is a critical safety component designed for combustion air proving in specialized industrial heating equipment, including Reznor waste oil heaters and Venturion models. Engineered to monitor the differential pressure within the induced draft assembly, this air pressure switch (often cross referenced as FS3440 894) ensures that proper venting is established before allowing the burner to cycle. By verifying airflow