S.91 - Maintenance: Demo mode

What does S.91 mean?

The boiler is currently operating in a demonstration mode. This mode is typically used for display or training purposes and restricts normal heating functions.

• Demo mode has been activated.
• Product is set for demonstration or showroom display.
• Incorrect setting after installation or maintenance.

Click steps to track your progress.

1. 1

   Check your boiler's settings to ensure it is not accidentally in demo mode. Refer to the 'Installation and maintenance instructions' to exit demo mode.

2. 2

   If you are unsure how to change this setting, contact a qualified heating engineer or customer service.

3. 3

   Press and hold the reset button for more than three seconds to see if it clears the demo mode.