Vokera E030 Fault Code: Causes, Fixes & Repair Costs
What does the Vokera E030 fault code mean?
The E030 code means your Vokera boiler has detected a problem with its flue fan and shut itself down as a safety precaution. The fan is responsible for pushing combustion gases safely out through the flue — without it working correctly, dangerous exhaust gases could back up inside your home. Because of this risk, the boiler's control board refuses to allow normal operation until the fault is resolved. On some Vokera model ranges you may see this displayed as A03 rather than E030, but both point to the same underlying fan malfunction.
General guidance only — not a substitute for professional advice, and not certified by a Gas Safe engineer. Always have your specific appliance assessed by a qualified professional. Any gas work must be carried out by a Gas Safe registered engineer. If you smell gas or suspect carbon monoxide, leave the property and call the National Gas Emergency line on 0800 111 999.
Common causes
- Worn or seized fan bearings Common
Over time the small bearings inside the fan motor wear down, causing the fan to spin too slowly, make grinding or rattling noises, or stop altogether. This is the single most common reason for an E030 on Vokera boilers and can often be resolved with a bearing replacement kit rather than a full fan swap.
- Burnt-out fan motor windings Common
The copper windings inside the fan motor can degrade through age or heat stress, causing the motor to lose power or fail entirely. This typically means a full fan replacement is needed rather than a repair.
- Wiring or connector faults Sometimes
Damaged, corroded, or loose wiring between the fan and the PCB can prevent the control board from receiving the correct speed signal. An engineer can trace the wiring loom with a multimeter to pinpoint any voltage drop or broken connection.
- Internal boiler leak affecting the fan Sometimes
A water leak inside the boiler can drip onto fan wiring, connectors, or the motor itself, causing intermittent or permanent failure. If there are signs of corrosion around the fan area, a leak should be investigated at the same time.
- Fan running below the required speed Sometimes
Even if the fan is physically turning, the boiler monitors its speed electronically. If the fan spins but can't reach the minimum safe speed — perhaps due to partial bearing wear or a weak motor — the boiler will still lock out with E030.
- PCB fault Rare
In rarer cases the printed circuit board fails to send the correct voltage to the fan, or misreads the fan speed signal, triggering the code even when the fan itself is undamaged. This is worth ruling out only after the fan and its wiring have been checked.
How to fix it
- Attempt a single boiler reset DIY safe
On models with a dedicated reset button (usually labelled R), press and hold it for around 3–5 seconds until the fault code stops flashing, then release and wait to see if the boiler restarts normally. On selector dial models, rotate the dial to the reset or OFF/RESET position, hold briefly, then return it to your normal heating setting. If the boiler fires up and runs without the code returning, monitor it for the next few hours. Do not reset more than two or three times in total — repeated resets on a fan fault will not fix the underlying problem and could mask a safety issue.
- Listen and look for obvious signs of fan trouble DIY safe
With the boiler cover on, listen carefully during a restart attempt. An unusual grinding, rattling, or humming noise from the boiler casing can indicate worn bearings or a struggling motor. Note down what you hear and when the code appears — this information will help an engineer diagnose the fault faster.
- Check there is no frozen condensate pipe (if weather is freezing) DIY safe
Although a frozen condensate is more typically associated with EA fault codes, a blockage can sometimes cause related lockouts. If temperatures are below zero, check the white plastic condensate pipe that exits your boiler and runs outside. If it feels solid, you can carefully thaw it with warm (not boiling) water poured along its length. This is unlikely to clear an E030 but is worth ruling out before calling an engineer.
- Call a Gas Safe registered engineer to inspect the fan Gas Safe engineer
If the reset does not clear the fault, or the code returns shortly after, the repair requires a qualified professional. The engineer will remove the boiler casing, check the fan for physical damage and measure its operating speed, test the wiring loom and connectors with a multimeter, and assess whether a bearing replacement, motor replacement, or full fan assembly is the most cost-effective fix. They will also check for any internal leaks that may have contributed to the failure. Verify your engineer's credentials at gassaferegister.co.uk before booking.
Parts you may need
- Vokera flue fan assembly (replacement) · from £150
- Fan bearing repair kit · from £25
- Fan wiring loom / harness · from £35
- PCB (printed circuit board) · from £280
The exact spare depends on your boiler's GC number (on the data badge). Check this against the part before buying.
Typical repair cost
Expect to pay roughly £225–£375, depending on the underlying cause.
Frequently asked questions
Can I fix a Vokera E030 fan fault myself?
Not safely. The fan is an internal boiler component and working on it involves accessing gas-related parts of the appliance. In the UK, only a Gas Safe registered engineer is legally permitted to carry out this type of repair. The one thing you can do yourself is attempt a single reset — but if the fault returns, stop and call a professional.
Is E030 the same as A03 on Vokera boilers?
Yes, effectively. E030 and A03 are the same fan-fault condition displayed differently depending on which Vokera model range you have. Older or different-display models show A03, while newer ranges display E030. The causes and repairs are identical.
How much does it cost to fix a Vokera E030 fan fault in the UK?
For the most common repair — replacing the fan assembly including parts and labour — most homeowners pay between £225 and £375. If the fault turns out to be worn bearings rather than a full motor failure, the cost can be towards the lower end. In rarer cases where the PCB is at fault rather than the fan itself, costs can be higher: a replacement PCB typically adds £200–£350 to the bill. Always get two or three quotes, as labour rates vary across different parts of the UK.
How long does a Vokera fan replacement take?
A straightforward fan swap usually takes a competent Gas Safe engineer between one and two hours, assuming the correct part is available. If the engineer needs to order a specific fan for your Vokera model, you may be without heating for a day or two while the part is sourced. It is worth asking the engineer to identify the exact part number before the appointment so they can bring it with them.