Vokera E010 Fault Code: Causes, Fixes & Repair Costs
What does the Vokera E010 fault code mean?
The E010 fault code causes your Vokera boiler to lock out as a safety measure. It most commonly points to a water pressure or circulation problem — the boiler detects that conditions aren't right to operate safely and shuts itself down to prevent damage. On certain Vokera models that use Riello burner technology, E010 can instead signal an ignition failure, where the boiler attempted to light but couldn't establish or confirm a stable flame. Both interpretations share the same code across the Vokera range, so the underlying cause depends on your specific model and what you observe on the display or in the system.
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
- Low system water pressure Common
This is the most frequent trigger for E010. If the pressure gauge reads below 1 bar when the system is cold, the boiler's safety circuit will lock it out. Pressure naturally drops slightly over time, but a sudden or repeated drop usually points to a leak or a failing expansion vessel rather than simple evaporation.
- Trapped air causing poor circulation Common
Air pockets in the system can prevent water circulating properly around the boiler and radiators. The boiler may sense inadequate flow or struggle to maintain temperature, triggering the lockout. Gurgling radiators or radiators that are cold at the top are tell-tale signs.
- Faulty pressure sensor Sometimes
Sometimes the system pressure is actually within the correct range (1–1.5 bar when cold) but the pressure sensor is misreading it and falsely reporting low pressure to the PCB. The boiler then locks out even though the real pressure is fine. This requires a Gas Safe engineer to diagnose and replace the sensor.
- Ignition failure — flame sensor or electrode fault (Riello models) Sometimes
On Vokera boilers using Riello burner assemblies, E010 specifically indicates the boiler failed to ignite or couldn't confirm a stable flame. A dirty, worn, or incorrectly positioned flame sensor may tell the PCB the flame has gone out even when it hasn't — or fail to confirm ignition at all. Similarly, a degraded ignition electrode or worn ignition leads can prevent the spark from forming reliably.
- PCB fault Rare
If all other components — the pressure sensor, ignition electrode, flame sensor, and leads — have been checked and are working correctly, the PCB itself may be failing to process sensor signals or control the ignition sequence properly. This is a less common cause but becomes more likely on older boilers.
How to fix it
- Check the system pressure gauge DIY safe
Look at the pressure gauge on the front of the boiler. When the system is cold, it should read between 1.0 and 1.5 bar. If it reads below 1 bar, low pressure is very likely the cause of the E010 fault.
- Top up the pressure using the filling loop if it is below 1 bar DIY safe
Locate the filling loop — a flexible braided hose with one or two valves, usually beneath the boiler. Slowly open the valve(s) and watch the gauge rise. Stop when it reaches around 1.2–1.5 bar and close the valve(s) firmly. Never overfill above 2 bar.
- Bleed your radiators to release trapped air DIY safe
Using a radiator bleed key, open the bleed valve at the top of each radiator slightly until you hear a hiss of air escaping. Once a steady trickle of water appears, close the valve. Work through all radiators. After bleeding, recheck the system pressure and top up again if it has dropped, as releasing air often causes a small pressure fall.
- Check that your gas supply is on DIY safe
Confirm that the gas isolation valve on the supply pipe to the boiler is in the open position (handle in line with the pipe). Check whether other gas appliances in your home — a gas hob, for instance — are working normally. If there is no gas supply at all, contact your gas supplier.
- Reset the boiler DIY safe
Once you have addressed any pressure or air issues, reset the boiler. On models with a dedicated reset button (often labelled R), press and hold it for 3–5 seconds until the fault display clears. On dial-operated models, turn the selector to the reset or off/reset position and hold briefly. Allow the boiler to run through its start-up sequence. Do not reset more than two or three times — repeated resets without resolution can mask a more serious fault.
- If the fault returns or will not clear, call a Gas Safe registered engineer Gas Safe engineer
A qualified engineer will carry out a full investigation: testing the pressure sensor for accuracy, inspecting and cleaning or replacing the ignition electrode and flame sensor, checking the ignition leads with a multimeter, examining the gas valve, and — if all else is in order — assessing the PCB. Do not attempt to work on any of these internal components yourself. You can check an engineer's credentials at GasSafeRegister.co.uk.
Parts you may need
- Pressure sensor · from £35
- Ignition electrode · from £25
- Flame sensor (ionisation probe) · from £20
- Ignition leads · from £30
- PCB (printed circuit board) · from £180
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 £100–£300, depending on the underlying cause.
Frequently asked questions
Can I fix the Vokera E010 fault myself?
Some homeowners can resolve E010 on their own by checking and topping up the system pressure to around 1.2 bar, bleeding the radiators, and resetting the boiler. These steps are safe for a non-engineer to carry out. However, if the fault returns after you have done all of this, or if the pressure keeps dropping, you will need a Gas Safe registered engineer to investigate internally — working on gas components, sensors, or the PCB is not something you should attempt without the appropriate registration and training.
Why does my Vokera keep showing E010 after I've reset it?
A fault that keeps coming back almost always means the underlying cause has not been addressed. If pressure is repeatedly dropping, there is likely a slow leak somewhere in the system or a failing expansion vessel that needs professional attention. If pressure is fine but the code returns, a faulty pressure sensor or — on Riello-based models — a worn ignition electrode, degraded flame sensor, or failing ignition leads may be the culprit. Repeated resets without a fix can mask a worsening problem, so it is worth getting an engineer in sooner rather than later.
How much does it cost to fix a Vokera E010 fault in the UK?
For the most common repairs — replacing a pressure sensor, ignition electrode, flame sensor, or ignition leads — most homeowners pay in the region of £100 to £300 including parts and labour. A Gas Safe engineer's call-out and diagnosis alone typically costs £70–£100. If the PCB turns out to be faulty, replacement costs can rise to £400–£650; at that point it is worth comparing the repair cost against a new boiler, especially if your Vokera is more than ten years old.
Is Vokera E010 dangerous?
The E010 lockout itself is the boiler's safety system doing its job — it shuts the boiler down rather than letting it run in an unsafe condition. Provided you do not attempt to override the lockout or tamper with gas components, you are not in immediate danger. However, if you smell gas at any point, do not reset the boiler. Leave the property, leave doors and windows open, and call the National Gas Emergency Service on 0800 111 999 immediately.