Vokera Boiler Fault Codes – Causes, Fixes & When to Call an Engineer

Common Vokera Boilers Problems and Solutions

Below, we outline the top issues seen in Vokera boilers, covering different models and fault codes, along with tips on how to resolve them.

1. Vokera Vision 30c Problems

Problem: Ignition issues and loud gurgling noises when starting up.

Solution:

• If the ignition is faulty, replacing the ignition parts will resolve the issue.
• If the problem stems from the PCB (Printed Circuit Board), it may entail a more expensive repair.

Recommendation: Contact a gas-safe heating engineer to diagnose and fix PCB or ignition faults.

2. Vokera Compact 29a Issues

Problem: Error code '03', typically indicating a fan fault.

Solution: Replace the fan entirely, as low-quality components in Vokera boilers can fail prematurely.

Recommendation: Replacing the fan altogether is generally more reliable than repairing it piecemeal. Get professional assistance for long-term performance.

3. Vokera Mynute Boiler Faults

Problem: Error codes '73' and '79' point to return thermistor faults.

Solution:

• Replace the return thermistor as a straightforward repair if this is the root cause.
• Other thermostat errors might signal a limit temperature fault or low-temperature issues, which require a professional evaluation.

Recommendation: Always consult a technician if you notice recurring thermostat-related errors or a drop in performance.

4. Vokera Linea 28 Problems

Problem:

• Error code '01' for ignition failure.
• Error code '03' for fan or flue problems.

Solution:

• Try resetting the boiler to resolve minor glitches.
• For persistent issues, replacements or professional assessments will be needed.

Recommendation: Contact Serviceteam for an engineer visit to ensure safe and effective boiler repairs.

5. Boiler Pressure Problems

Problem: Low water pressure (error codes '40', '41', or 'A04').

Solution:

• Low pressure could signal a leak. Re-pressurise the boiler using the manufacturer's guidelines.
• If pressure continues to drop, call an engineer to identify and repair leaks.

Recommendation: Persistent low pressure requires expert intervention to prevent further damage.

6. Flashing Red Lights

Problem: Indicates ignition failure in most Vokera models, sometimes accompanied by error code 'A01'.

Solution: Reset your boiler. If this doesn't resolve the issue, the ignition components or gas supply may need attention.

Recommendation: This is a critical issue that requires Gas Safe-certified professionals.

7. Flashing Green Lights

Problem: It could indicate a faulty hot water sensor or that the boiler is in standby mode.

Solution: Resetting the boiler may fix the issue. If not, the sensor might need replacement.

Recommendation: Arrange for an engineer if the flashing persists after a reset.

8. Boiler Hot Water Issues

Problem: The water is not heating up or is only producing lukewarm water.

Solution: Often caused by diverter valve issues on Flowmatic and Unica HE models. Repairs may involve replacing or servicing the valve.

Recommendation:Have a technician assess whether a full diverter replacement is required.

9. Condensate Pipe Blockages

Problem: Error codes '92', '93', or '95' are caused by a blocked or frozen condensate pipe.

Solution: Often caused by diverter valve issues on Flowmatic and Unica HE models. Repairs may involve replacing or servicing the valve.

Recommendation:Have a technician assess whether a full diverter replacement is required.

10. Boiler Kettling Noises

Problem: Whistling, banging, or gurgling noises are caused by low water pressure, limescale build-up, or kettling.

Solution: Bleeding radiators might help. If the issue persists, the heating system may need to be power-flushed to remove limescale and sludge.

Recommendation: Frequent kettling noises should be addressed by professionals to maintain efficiency.

Check out our blog, “Why Is My Boiler Making a Ticking Noise?” to discover the common causes behind the sound and how to address them effectively.

Vokera Boiler Fault Codes Guide

General Codes

‘A’ Series of Codes

Vokera Mynute Boiler Codes

Evolve Combi & System Codes

Additional General Codes

For a full breakdown of error codes, refer to your Vokera boiler manual or contact us to have the issue interpreted and addressed. Be sure to check out our ‘Boiler Error Code’ blog section to learn more about different fault codes and what they mean.

When to Call a Professional Engineer?

While basic troubleshooting can help resolve minor Vokera boiler faults, some problems require professional expertise.

Here are common scenarios where you MUST contact a boiler professional:

• Persistent low or fluctuating pressure.
• Flashing red or green lights that don't resolve after a reset.
• The boiler is not producing hot water or heating effectively.
• Kettling noises despite regular system bleeding.
• Any issue linked to gas, ignition, or combustion fault codes.

Our gas heating engineers are specialists in repairing and maintaining Vokera boilers and can help get yours back to optimal working condition safely.

Ensuring Boiler Longevity

Regular maintenance is key to keeping your Vokera boiler running for years to come. We recommend:

• Booking annual boiler service appointments.
• Checking pressure levels monthly.
• Bleeding radiators and cleaning external components like the condensate pipe to avoid blockages.

Call Serviceteam for routine servicing and expert repairs to extend your boiler's lifespan and ensure your home stays warm and comfortable.

FAQs

If your Vokera boiler isn't working properly, a quick reset might solve the issue. Just turn the mode selector to 'Off/Reset', wait a few seconds, then switch it back to 'Heating & Hot Water' or 'Hot Water Only'. If it’s still not working, it may need professional attention. Contact a heating engineer.

Most Vokera boilers come with a 12-month warranty, but you can often extend it up to 7 years with proper care. The lifespan of your boiler depends on how often it's used, how well it's installed, and how regularly it's serviced.

If the pressure drops below 1 bar, your boiler may stop working. You can re-pressurise it using the instructions in your manual. But if the pressure keeps rising or falling—even after adjustment—it could be a leak or another issue that needs expert repair.

Your boiler's pressure should sit between 1.0 and 1.5 bar when cold. If it consistently stays too low or too high, there's likely a problem that needs fixing.

A red flashing light typically indicates that your boiler has entered lockout mode. This prevents it from working to keep you safe. There could be various causes, so it's best to have a Gas Safe engineer inspect and resolve the issue.

If your boiler doesn't start, the issue might be with the pump, circuit board, pressure, or even the gas supply. Don’t guess—call a qualified heating engineer to diagnose and fix the problem safely.