The master code for a CAL01 control panel is 1 0 0 0. For more information please see the Quick Settings Guide: https://www.reznor.co.uk/wp-content/uploads/2025/09/Reznor-CAL01-Quick-Settings-Guide-EN.pdf.
What is the master code for a CAL01 control panel?
Information on Reznor's range of control panels