Low
UU/5 on Ariston Genus 27

Your boiler is displaying the current temperature of the hot water leaving the unit, which is usually an informative status update rather than a critical system failure.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Domestic hot water output temperature (C°)

DIY fix possible

Check if any hot water taps are currently runningMonitor the display to see if the code changes to a temperature reading or standby modeReset the boiler if the code remains frozen on the screen for a long period

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