The master code for the AMBITECH PLUS control panel is 0 0 0 0. For more information please view the Installation Manual: https://www.reznor.co.uk/wp-content/uploads/2025/09/AmbiRad-AmbiTec-Plus-Installation-Manual-EN-2001-02-GB-WA-032-0201.pdf.
What is the AMBITECH PLUS control panel master code?
Information on Reznor's range of control panels