The 01 fault code appears on 2 boiler brands — Ravenheat and Vokera — and on all of them it points to the same kind of problem. The details still differ by brand (thresholds, sub-codes, reset procedure), so use the table below to jump to the page for your boiler.
The brand is printed on the front casing. Tap your brand for the full causes, fixes and repair costs.
| Brand | What 01 means | Severity | DIY? |
|---|---|---|---|
R Ravenheat | Fault code 01 on a Ravenheat boiler indicates that the boiler attempted to light the main burner but could not establish or confirm a stable flame within its allowed ignition attempts. Full guide → | Lockout — engineer likely | No |
V Vokera | The Vokera A01 fault code (also displayed as fault code 10 on some Linea models) means the boiler attempted to light the burner after a heat demand but failed to establish a flame within… Full guide → | Lockout — engineer likely | Some checks |
Fault code 01 on a Ravenheat boiler indicates that the boiler attempted to light the main burner but could not establish or confirm a stable flame within its allowed ignition attempts. The PCB detects no valid flame signal and puts the boiler into a safety lockout, cutting off both central heating and hot water until the underlying problem is resolved and the boiler is reset.
Causes, fixes & costs for Ravenheat 01 → · All Ravenheat codes
The Vokera A01 fault code (also displayed as fault code 10 on some Linea models) means the boiler attempted to light the burner after a heat demand but failed to establish a flame within the expected timeframe. As a safety precaution, the control board shuts the boiler down to prevent unburned gas from accumulating. The boiler will not restart until the underlying cause is addressed and the unit is reset. In plain terms: the boiler tried to ignite, got no confirmation of a flame, and locked out.
Broadly, yes — on Ravenheat and Vokera the 01 code points to the same class of fault, and the recommended response is similar. Model-specific details such as sub-codes and reset procedures still vary, so follow the page for your own brand.
On some brands there are safe homeowner checks first — typically system pressure, the condensate pipe in cold weather, and a single reset. The underlying repair usually needs a registered engineer. Never open the boiler casing yourself.
For gas boilers, a Gas Safe registered engineer — it is a legal requirement for any work on the appliance. If you smell gas at any point, leave the property and call the National Gas Emergency line on 0800 111 999.
General guidance only — not a substitute for professional advice, and not certified by a registered engineer. Any work on a gas appliance must be carried out by a Gas Safe registered engineer. If you smell gas, call 0800 111 999.
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