Low Information
62:1 to 62:15 on Viessmann Vitodens 300-W

Your boiler is notifying you of the current pump run-on settings rather than an actual fault, essentially staying operational for a set time after central heating is turned off.

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

Run-on time adjustable from 1 to 15 minutes

What causes this fault?

This is not a mechanical failure but rather a custom setting that dictates how long the internal pump continues to circulate water after the burners have turned off. It is designed to dissipate residual heat from the heat exchanger to protect the internal components from overheating. If you see this code, it simply means the boiler is carrying out its programmed cooling cycle before coming to a complete stop.

DIY fix possible

Check the user manual to see if you wish to adjust the fan or pump run-on duration.No action is required if the boiler is providing heating and hot water as normal.Restart the boiler to clear the display if it is stuck on this status code.

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