Why is my furnace giving a pressure switch error code

Optimized Airflow: Engineered for 115V systems to provide consistent static pressure and maximum thermal distribution

specifically engineered for SFH tankless boiler systems

and resets at 1

ensuring a reliable interface with the integrated ignition module and reducing troubleshooting time during emergency service calls

Hydrolevel WM-1 Water Meter 321042-401 Why is my furnace givingThe Hydrolevel WM 1 Water Meter is a professional grade, heavy duty water meter engineered for accurate fluid tracking in commercial and residential hydronic systems. Specifically designed as a companion for the Hydrolevel VXTC water feeder, this meter provides critical data on make up water consumption, allowing contractors to identify hidden leaks or excessive scaling in low pressure steam boilers and hot water boilers. With a robust bronze body