this Williams control board is the correct solution

This high-grade composite M&M 323300 gasket offers superior resistance to chemical additives and high temperatures without the need for additional adhesives

reducing heat buildup and contact wear

though it must not be installed upside down

Resideo HM750ACYL Replacement Canister Freon this Williams control board isFor contractors servicing high efficiency residential systems, the Resideo HM750ACYL Replacement Canister is the essential consumable component for the HM750A1000 Advanced Electrode Steam Humidifier. This replacement steam cylinder utilizes submerged electrodes to generate atmospheric steam, providing a consistent 11 to 22 gallons per day (GPD) output depending on the configured voltage (120V or 240V). The HM750ACYL is pre mineralized to ensure rapid