ensure your controller is configured for the correct resistance curve to prevent offset errors

wall furnace

ensuring factory-standard fitment

For technicians troubleshooting HVAC motor start failures or fluctuating amperage draws

it is recommended to use the genuine OEM 5H0730570003

Resideo 4074ETH Flow Switch Els PW 17895 ensure your controller is configuredThe Resideo 4074ETH Flow Switch is a critical sensing component engineered specifically for F50 and F58 Series Electronic Air Cleaners. This differential pressure switch serves as the primary interlock, ensuring the air cleaner cells are only energized when sufficient HVAC system airflow is detected. This prevents ozone buildup and protects internal components from premature failure due to static operation. The 4074ETH is a direct replacements for the