Vokèra Boiler Fault Codes: Error Codes & What They Mean

Vokèra boiler fault code showing? The code is designed to help identify what part of the boiler’s operation has gone wrong, but the meaning depends on your exact Vokèra model.

Older Vokèra boilers can use codes such as A01, A02 and A04, while newer boilers may display A10, A40 or E-series codes such as E010 and E040.

For that reason, always identify your boiler model before using a fault-code table. The code is a diagnostic clue, not proof that a particular component needs replacing.

How to Find the Correct Vokèra Fault Code

Before searching for a repair, make a note of:

• the exact Vokèra boiler model;
• the complete error code shown;
• whether the display or warning light is red, orange or another colour;
• the boiler pressure reading;
• whether heating, hot water or both have stopped;
• whether the boiler works temporarily after resetting.

Vokèra has produced several generations of boilers with different controls and error-code systems, so the same number should not automatically be applied to every model.

Common Vokèra Boiler Fault Codes

The following table covers common fault groups found across several Vokèra ranges. Always check the manual for your exact boiler before acting on a code.

Vokèra A01, A10 or E010: Ignition / Flame Lockout

Ignition-related codes vary between Vokèra generations.

For example, some older models use A01, Easi-Heat i documentation uses A10, while newer platforms can use E010.

Depending on the particular model, the fault can involve:

• failure to establish a flame;
• failure to detect the flame;
• a gas-supply problem;
• an ignition component;
• condensate drainage;
• an air/flue restriction;
• another combustion-related fault.

You can check whether another gas appliance works and whether a prepayment meter has credit.

Do not remove the boiler casing, adjust the gas valve or work on ignition components yourself.

If your main symptom is that the boiler will not start, see:

Boiler Not Firing Up? Causes & What to Check

Vokèra A02, A20 or E020: Overheat / Limit Thermostat Fault

On relevant Vokèra models, these codes relate to the high-limit or safety thermostat.

The boiler may shut down because an unsafe or abnormal temperature condition has been detected.

Possible areas an engineer may consider include:

• water circulation;
• the heating pump;
• temperature sensors;
• system blockages;
• the limit thermostat itself.

Do not continually reset an overheating boiler.

If the fault returns, the reason for the excessive temperature needs to be identified.

Vokèra A03, A30 or E030: Fan Fault

Different Vokèra generations use different codes for fan-related problems.

For example, older models may show A03 while other ranges use A30 or E030.

The fan forms part of the boiler’s combustion and flue system, so this is not a homeowner repair.

Depending on the exact model, an engineer may need to check:

• fan operation;
• fan wiring;
• the fan speed signal;
• flue or air-path restrictions;
• associated control components.

Vokèra A04, A40 or E040: Low Boiler Pressure

Low water pressure is one of the most common faults homeowners can identify themselves.

Depending on the Vokèra model, low system pressure may appear as codes such as:

• A04;
• A40;
• E040;
• E041;
• FIL or another low-pressure warning.

Vokèra commonly recommends around 1 to 1.5 bar on relevant sealed systems, but always follow the instructions for your exact boiler.

If the pressure is genuinely low and your manual explains how to refill the system, you may be able to restore it using the filling arrangement.

For more information, see:

Normal Boiler Pressure & Pressure Adjustment

If you have to keep topping the boiler up, that is more important than the one-off low reading.

See:

Why Does My Boiler Pressure Keep Dropping?

Vokèra A42 or E042: Pressure Sensor Fault

Some Vokèra models distinguish between genuinely low water pressure and a fault with the component measuring that pressure.

This is important because adding more water will not repair a defective pressure sensor.

If the boiler pressure appears normal but a pressure-related error remains, do not continue filling the heating system.

An engineer may need to check the pressure transducer, associated wiring and the actual system pressure.

Vokèra A60 or E060: Hot-Water Sensor Fault

On relevant Vokèra boilers, A60 or E060 can relate to a domestic-hot-water temperature sensor or probe.

Possible symptoms may include:

• hot water not operating correctly;
• unstable hot-water temperature;
• a fault appearing during hot-water demand.

The exact interpretation depends on the boiler model, so check the correct Vokèra manual before assuming the sensor itself needs replacing.

If your boiler runs but you have no hot water, also see:

No Hot Water From Boiler? Causes & What to Check

Vokèra A70 / E070 and A80 / E080: Flow and Return Sensor Faults

The boiler monitors the temperature of water travelling out through the heating flow and returning to the appliance.

On relevant Vokèra ranges, A70 or E070 relates to the flow temperature sensor, while A80 or E080 can relate to the return sensor.

Depending on the exact model and code, the fault can involve:

• a defective temperature sensor;
• sensor wiring;
• an overtemperature condition;
• an excessive flow-to-return temperature difference;
• a circulation problem.

The code therefore should not automatically result in a new sensor being fitted without testing.

Vokèra A90 / E090 and E091: Flue-Gas Sensor or Heat-Exchanger Warning

Some Vokèra models monitor flue-gas temperature using an exhaust or flue-gas sensor.

A90 or E090 can indicate a fault involving that sensor on relevant models.

Some newer Vokèra boilers can also display E091, which can indicate that the primary heat exchanger requires cleaning according to the appliance’s diagnostic system.

These are not homeowner maintenance tasks.

Do not remove the boiler casing or attempt to dismantle or clean combustion components yourself.

Newer Vokèra E-Series Fault Codes

Newer Vokèra boiler platforms can use more detailed E-series diagnostics.

Examples found on current Vokèra documentation include:

This is why the boiler model is essential. Do not use a newer E-series table to diagnose an older Vokèra appliance that uses a different control system.

Vokèra E040: What Should I Do?

On relevant newer Vokèra boilers, E040 means the system pressure is too low and the heating system needs filling.

Some models first show a warning or temporary E041 condition before progressing to a permanent E040 lockout.

If the pressure is genuinely low:

1. check your exact Vokèra user manual;
2. identify the correct filling arrangement;
3. increase the pressure slowly;
4. stop at the pressure specified by Vokèra;
5. fully close the filling controls afterwards.

If pressure continues falling after you refill the boiler, investigate the reason for the pressure loss rather than continually topping up.

Why Does My Vokèra Boiler Have a Red Light?

On many Vokèra boilers, a red light indicates a fault or lockout, but the exact meaning depends on the appliance.

Some older boilers use combinations of coloured LEDs rather than a detailed digital error code.

Other boilers display a fault code together with a red warning indication.

If your main symptom is the warning light rather than a readable code, see:

Vokèra Boiler Red Light On: What It Means

Can I Reset a Vokèra Boiler Fault?

Many Vokèra boilers have a normal reset procedure described in their user manual.

You can use that procedure for an appropriate lockout after recording the fault code.

However, resetting does not repair the underlying fault.

If the same error returns, repeatedly resetting the boiler can hide useful diagnostic information and will not repair:

• an ignition fault;
• a fan problem;
• a temperature-sensor fault;
• a pressure sensor;
• a circulation problem;
• another internal component failure.

Newer Vokèra documentation can also limit the number of consecutive reset attempts before another lockout is displayed.

Why Does My Vokèra Boiler Keep Losing Pressure?

Vokèra advises that frequently needing to top up the heating system can indicate a water leak.

Check visible areas such as:

• radiator valves;
• accessible heating pipework;
• the area underneath the boiler;
• visible pipe joints.

If the pressure keeps falling, see:

Why Does My Boiler Pressure Keep Dropping?

If water is visibly coming from the boiler, see:

Boiler Leaking Water? Causes & What to Do

Why Is My Vokèra Boiler Not Igniting?

Before calling an engineer, Vokèra recommends basic checks such as confirming:

• gas is available to the boiler;
• electricity is available;
• there is sufficient system water pressure;
• the boiler controls are switched on correctly;
• a prepayment gas meter has credit if applicable.

If these checks are satisfactory but the boiler remains in ignition lockout, professional diagnosis may be needed.

Can I Fix a Vokèra Fault Code Myself?

Some external checks are appropriate for homeowners.

You can usually:

• record the fault code;
• identify the boiler model;
• check the boiler pressure;
• check the electrical supply;
• check that the heating controls are on;
• check whether another gas appliance works;
• use the normal reset procedure in your user manual.

Depending on your model, you may also be able to repressurise the heating system by following the manufacturer’s instructions.

You should not:

• remove the boiler casing;
• work on the burner or gas valve;
• test gas pressure;
• repair fan or flue components;
• replace internal electrical components;
• alter combustion settings;
• bypass a safety device.

How Is a Vokèra Boiler Fault Diagnosed?

A useful diagnosis starts with the exact model and exact code.

An engineer can then combine that information with:

• the boiler pressure;
• the symptoms;
• when the fault occurs;
• manufacturer diagnostic information;
• electrical and component testing where necessary.

Engineer point: a fault code identifies an abnormal condition or diagnostic area. It should not automatically be treated as an instruction to replace the component named beside the code.

How Much Does a Vokèra Boiler Fault Cost to Repair?

There is no accurate universal repair price because a Vokèra error code can lead to several different diagnoses.

For example, an ignition lockout could ultimately involve:

• a supply issue;
• condensate drainage;
• an ignition component;
• a gas valve;
• a fan or air-path problem;
• an electrical control fault.

Likewise, a pressure-related warning could be genuine low water pressure, an ongoing leak or a faulty pressure sensor.

The fault should therefore be diagnosed before a repair price is quoted.

Does a Vokèra Fault Code Mean I Need a New Boiler?

No.

A fault code does not automatically mean the boiler needs replacing.

Many ignition, pressure, sensor, fan and circulation faults can be repaired.

Replacement becomes worth comparing if an older appliance has several significant faults or the confirmed repair is substantial relative to its age and overall condition.

If you are comparing the options, see:

New Boiler Cost Guide

What Should I Do If I Smell Gas?

A boiler fault code by itself does not necessarily mean there is a gas leak.

However, if you smell gas or suspect a gas escape, stop troubleshooting the boiler.

Open doors and windows, avoid anything that could ignite the gas, and turn off the gas supply at the meter if you know how to do so safely.

In Great Britain, call the National Gas Emergency Service immediately on 0800 111 999.

Do not continue using an appliance you suspect may be unsafe.

When Should I Call a Boiler Engineer?

Arrange professional diagnosis if:

• the same fault code keeps returning;
• the boiler will not reset;
• heating or hot water remains unavailable;
• pressure repeatedly falls;
• the boiler is leaking;
• an ignition, fan, sensor or combustion fault is displayed;
• you would need to remove the boiler casing to investigate further.

For professional boiler fault diagnosis, visit:

Boiler Repairs

Vokèra Boiler Fault in Cardiff?

If you’re in Cardiff and your Vokèra boiler is displaying a fault code, repeatedly locking out or has stopped providing heating or hot water, visit:

Boiler Repair in Cardiff

When booking, tell us:

• your exact Vokèra model;
• the complete fault code;
• the boiler pressure;
• whether heating, hot water or both have stopped;
• whether the boiler works after resetting;
• how frequently the fault occurs.

Quick Questions

What does a Vokèra boiler fault code mean?

A fault code identifies a problem or abnormal operating condition detected by the boiler. The exact meaning depends on the Vokèra model and generation.

Are Vokèra fault codes the same on every boiler?

No. Older and newer Vokèra boilers use different error-code systems, so always check the manual for your exact model.

What does A01 mean on a Vokèra boiler?

On relevant older Vokèra boilers, A01 commonly relates to ignition failure or the boiler failing to detect a flame. The exact definition should be checked against the model manual.

What does E010 mean on a Vokèra boiler?

On relevant newer Vokèra boilers, E010 is a flame-lockout fault.

What does E040 mean on a Vokèra boiler?

On relevant newer Vokèra models, E040 indicates low heating-system water pressure requiring the system pressure to be checked and, where appropriate, refilled according to the boiler instructions.

Why is my Vokèra boiler showing a red light?

A red light commonly indicates a fault or lockout, but its exact meaning depends on the Vokèra model and any accompanying code or LED pattern.

Can I reset my Vokèra boiler?

Use only the normal reset procedure stated in the user manual for your boiler. If the same fault returns, arrange diagnosis rather than continually resetting the appliance.

What pressure should my Vokèra boiler be?

Many Vokèra sealed systems operate at around 1 to 1.5 bar when cold, but the correct pressure should always be checked in the manual for your particular model.

Need Help With a Vokèra Boiler Fault?

Let’s Heat can diagnose Vokèra boiler fault codes, ignition failures, pressure faults, recurring lockouts and heating or hot-water breakdowns.

You do not need to know which component has failed before booking. The exact boiler model and fault code are the most useful details to provide.

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Sources Checked

Vokèra uses different fault-code systems across different boiler ranges, so this guide has been checked against current and previous official Vokèra manuals and homeowner guidance.

Vokèra – Official Boiler Manuals & Literature

Vokèra – Official Homeowner Fault & Customer Care Guidance

Vokèra – Easi-Heat i Installation Manual

Vokèra – Current E-Series Boiler Technical Manual