Medium Warning
10 on Vokera Easi-Heat 25

Your boiler is experiencing a temporary communication error or sensing issue that is preventing it from firing correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Gas supply problem. Gas line requires purging. Reversed polarity. Broken, internal flue joint

What causes this fault?

This fault occurs when the boiler's internal control board fails to receive a consistent signal from the sensors that monitor ignition or temperature. The most common reason is a temporary electronic glitch or a sensor starting to fail, which prevents the boiler from confirming it is safe to start the burner.

DIY fix possible

Locate the mode selector switch on the front control panel.Turn the switch to the 'OFF/RESET' position and wait for 10 seconds.Turn the switch back to either 'Hot Water Only' or 'Heating and Hot Water' to restart the system.

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