Plain-English answers to the questions London asks us every day: what that error code means, what a repair should cost, and when to stop repairing altogether. No jargon, no scare tactics, and every guide ends with what to do next.
How to top up your Logic safely, why the pressure keeps dropping, and when F1
Your Greenstar overheated and shut down. What each E9 sub-code means and what usually causes
The safe lockout state and why frozen condensate pipes cause it on cold mornings.
Ignition failed after repeated attempts. Check your gas first, then what an engineer looks at.
The boiler cannot detect a pressure rise when the pump runs. Pump and sensor checks
Flame lit, then lost mid-burn. Gas, flue, condensate and electrode causes, plus London repair costs.
A frozen condensate pipe blocks your boiler’s waste drain and shuts the boiler down, usually
The rule engineers use: if a repair costs more than half the price of a
The Vaillant F28 fault code means ignition failure: the boiler attempted to light and could
The Vaillant F28 fault code means ignition failure: the boiler attempted to light and could
