What the manual says
Manufacturer manualEnable/Disable Internal Programmer 0: CH Off, DHW Off (default) 1: CH Off, DHW On 2: CH On, DHW Off 3: CH On, DHW On
Shared across the Ultracom range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Check your external heating controller or thermostat displayAdjust your time clock settings to your preferred heating and hot water scheduleMonitor the display to ensure the code changes to reflect your new active settings
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Related fault codes
All 23 fault codes on the Ultracom hxi
Seeing a different code? Every code this model can display, in one place.