Low
D.83 on Vaillant Combi Compact 282EB

Your boiler is correctly telling you it is preparing to heat up water for your taps rather than for your radiators.

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

Burner start up in hot water mode

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful