Roca boiler error codes: meanings and safe checks

A locked-out Roca boiler needs its code and model identified before any attempt to restore operation: a pressure warning calls for a different response from an ignition or flue fault. Record what the display shows, read the pressure without operating any valves and avoid repeated resets. If you smell gas, see smoke or hear a carbon monoxide alarm, stop using the boiler and seek help from a safe location.

If you have a problem with your boiler, you can use our free error code finder. It can help you identify errors and find straightforward, effective guidance on resolving them.

The model changes what the warning means

Roca does not use a single fault-reporting system across all its boilers. Some have a screen with alphanumeric codes, others display numbers without a letter, and some communicate faults through indicator lights. A gas boiler and an oil-fired Gavina Confort also have different components and controls. That is why a universal table is not enough to diagnose every appliance bearing the brand.

The distinction has practical consequences. In the warning list attributed to appliances using E codes, E02 is associated with the safety thermostat operating. On the Gavina Confort, 02 means low pressure. These are not interchangeable versions of the same warning: the letter belongs to the code, and leaving it out can lead to an entirely different fault being identified.

Look for the full model name in the documentation or on a label visible without removing the casing. Laura, Nora, Victoria, Neobit and Gavina identify product families, but the variant following the name may also be needed. A photograph of the front panel and accessible identification label preserves the exact appliance details without touching any internal components.

The tables below separate warnings with an E prefix from those documented for the Gavina Confort. The available E-code list does not identify the specific manual for each model, so it is guidance only and must be checked against the appliance documentation. It does not confirm a failed component or establish that the meanings apply automatically to every Roca or Baxi boiler.

Warnings beginning with E require a model-range check

On appliances whose manuals use these definitions, the warnings distinguish ignition, temperature, circulation and electrical supply problems. This helps explain the lockout but does not replace professional testing. The causes column gives possible sources of the fault, not a definitive diagnosis or an instruction to replace components.

E25 and E26 need particular care: they are associated with a safety response to insufficient circulation and a possible seized pump, but that association does not prove the pump has failed. A sensor warning also requires the whole sensing arrangement to be checked. The model manual takes precedence over any general code comparison.

E33 is also associated with reversed live and neutral in some Roca references, but without enough model-range information to make that interpretation universal. If it appears on the display, check the specific manual. In any event, do not alter electrical connections or attempt trial-and-error changes to the electrical installation.

Gavina Confort uses a different code list

The Gavina Confort family described here consists of oil-fired boilers. On these appliances, 01 means burner lockout, while 02 and 03 distinguish low and high pressure. This distinction matters: applying the previous table to these numbers would produce an incorrect interpretation of the lockout and could delay the appropriate inspection.

On certain Confort control panels, the code can be viewed by holding the minus and plus buttons simultaneously for 5 seconds. This is a panel readout, not a repair. Only do this if the manual for that version confirms the combination; it must not be confused with installer menus or parameter resets.

A 01 lockout does not establish that the entire burner needs replacing. It can result from causes as different as a lack of fuel, contamination or a detection problem. The table describes the system that needs inspection; choosing a replacement part requires establishing what has failed within that system.

Pressure provides clues, not permission to refill blindly

The pressure gauge is one of the few readings a user can check without taking anything apart. Record whether the boiler is cold or hot, because pressure can change with temperature. General guidance quotes between 1 and 1.5 bar for certain appliances, but that range is not a universal setting for every Roca installation.

A range of 1 to 2 bar is also quoted for Gavina Confort. The difference should not be resolved by choosing the higher figure: the manual and the particular installation determine the correct value. Nor should a maximum permissible pressure of 3 bar on certain models be confused with normal operating pressure or a filling target.

A recurring drop should not be treated as normal or automatically attributed to evaporation. There may be a visible leak, discharge through a valve, or an expansion or detection problem. Observing the floor, radiators and exposed connections is enough; do not open the circuit, operate valves as a test or remove covers to look for a leak.

If the reading rises sharply as the system heats up and falls again as it cools, recording both values is more useful than continually adding water. That behaviour needs professional interpretation and does not, by itself, confirm a failed component. For safety, filling and depressurising the system fall outside the checks described here, since they involve working with pressurised water.

Ignition and flue faults set the limits for resetting

An ignition fault does not, by itself, prove that the gas valve has failed. The boiler may not be receiving fuel, producing ignition or recognising the flame. An oil-fired appliance involves additional components. External checks can include a reported supplier outage or an accessible gauge, but do not test the fuel supply by lighting other appliances or interfering with the fuel circuit.

A reset is appropriate only when the manual permits it, there are no warning signs and the code has been identified. If the lockout returns after the attempt specified by the manufacturer, stop. Repeated resets do not fix the cause and turn a safety response into a series of starts that provides no reliable diagnosis.

Warnings involving flue gases, overheating or abnormal flame detection require particular care. Disappearing for a few minutes does not establish that the fault is resolved. Qualified professionals must inspect the flue, burner and combustion safeguards; do not dismantle flue ducts, insert objects into outlets or disable sensors.

If you smell gas, do not operate electrical switches or try to restart the appliance. Leave the area and contact the emergency services or the gas supplier’s emergency service from a safe place. If there is smoke, a carbon monoxide alarm or symptoms consistent with exposure, the priority is to leave the affected area, not photograph the display or continue searching for the code.

Front-panel lights also communicate faults

Some Roca Victoria and Neobit boilers report faults through combinations of indicator lights rather than an alphanumeric display. The numbers printed beside the lights may represent temperatures and also form part of the fault indication. A combination such as 50, 70 and 90 must not be read as an E code or interpreted without knowing the control-panel version.

Useful observations include which lights are on, which are flashing and whether they appear during a heating demand or when hot water is drawn. A photograph or short video preserves the pattern without interfering with the appliance. Where no meaning has been confirmed for that model, leave the identification unresolved rather than assigning a fault borrowed from another range.

Problems can also occur without a code: water alternating between hot and cold, inadequate temperature or interrupted operation. Noting whether the issue affects one tap or all of them helps describe its extent. An accessible tap aerator can be cleaned with the tap turned off, but do not change electrical connections to correct temperature fluctuations or adopt that explanation without diagnosis.

Establish the fault before buying a replacement part

A sensor mentioned on the display may be faulty, but the problem could also lie in its connection or in how its signal is received. The same applies to a circulation warning: it does not automatically identify a failed pump. Buying on the strength of a code, without confirming the part reference and cause, creates the risk of buying an unnecessary part while leaving the lockout unresolved.

Opening the appliance is not a harmless preliminary check, either. Apart from electrical and combustion risks, unauthorised work can complicate the assessment of a warranty or service-plan claim. Check those terms before dismantling anything; reading the display is not equivalent to working on the burner, electronics or hydraulic circuit.

No reliable repair price can be inferred from E01, E10 or any other warning alone. Cost depends on the confirmed cause, appliance version, replacement-part availability and scope of the work. A useful quotation should distinguish diagnosis, call-out, materials and taxes, and clarify whether the visit costs extra or is deducted if the repair is accepted.

When considering replacing an old boiler, compare an identified repair with the total installed cost of a new appliance, not the price of a part with that of an uninstalled boiler. Overall condition, previous faults and parts availability all matter. A code does not determine replacement, and a quotation without a diagnosis does not provide a sound basis for that decision either.

A warning becomes useful when its context is preserved

The most useful information for an inspection is specific: the full model, the code including every letter, the observed pressure and when the lockout occurs. It matters whether it happens as the heating starts, during a shower or after a supply interruption. These details help distinguish the symptom from its possible cause without putting the boiler through improvised tests.

If the warning disappears after a recovery procedure permitted by the manual, keep a record rather than treating that as proof there is no fault. If it returns, pressure changes or unusual noises and smells appear, stop using the appliance and arrange an inspection. The boundary is clear: observing and recording are safe; work involving electricity, fuel, combustion or pressurised water belongs to a qualified technician.