Common Vokera Boiler Faults & How to Fix Them – Expert Advice from a Gas Engineer in Glasgow & Surrounding Areas Vokera boilers are widely used across the UK due to their affordability and efficiency

Common Vokera Boiler Faults & How to Fix Them – Expert Advice from a Gas Engineer in Glasgow & Surrounding Areas

Vokera boilers are widely used across the UK due to their affordability and efficiency. However, like any boiler, they can develop faults over time. As a highly experienced Gas Safe engineer serving Glasgow, Clydebank, Bearsden, Milngavie, Scotstoun, Anniesland, Knightswood, Partick, Maryhill, Paisley, Renfrew, and surrounding areas, I’ve diagnosed and repaired countless Vokera boiler issues. In this guide, I’ll go through the most common faults, how to troubleshoot them, and when it’s time to call in a professional.

1. Vokera Boiler Not Igniting? Here’s What to Check

If your Vokera boiler isn’t firing up, the issue is likely caused by:

Gas Supply Issues – Ensure your gas supply is on and check other gas appliances.

Faulty Ignition Electrode – If the electrode is dirty or faulty, the boiler won’t ignite.

Low Gas Pressure – Your gas supplier may be experiencing issues, or there could be a blockage in the supply line.

Flame Sensing Issues – The flame sensor may need cleaning or replacing.

✅ Quick Fix: Try resetting the boiler. If the issue persists, it’s best to have a Gas Safe engineer inspect it.

2. Vokera Boiler Losing Pressure

A drop in boiler pressure can lead to heating and hot water issues. Common causes include:

Water Leaks – Check around the boiler and radiators for any leaks.

Faulty Pressure Relief Valve – If the valve is faulty, the system may lose pressure.

Air in the System – Bleeding the radiators can help resolve trapped air.

⚠ Expert Tip: If your boiler constantly loses pressure, it could indicate a hidden leak in the system. A professional inspection is recommended.

3. Vokera Boiler Making Banging or Whistling Noises?

Unusual noises coming from your boiler often indicate:

Kettling – A build-up of limescale in the heat exchanger, reducing efficiency.

Trapped Air – This can cause a gurgling sound, often fixed by bleeding the radiators.

Pump Issues – A failing or blocked pump can cause loud banging or humming sounds.

🔧 Pro Advice: A system flush can help remove limescale and sludge, improving boiler performance.

4. Vokera Boiler Displaying Fault Codes?

Your boiler’s digital display may show error codes. Here are some common ones:

A01 – Ignition failure (check gas supply and ignition electrode).

A03 – Overheating detected (could be a blocked heat exchanger or faulty thermostat).

A04 – Low water pressure (repressurise the system using the filling loop).

A06 – Fan failure (may indicate a faulty fan or air pressure switch issue).

📌 Troubleshooting Tip: Reset the boiler and check the pressure gauge. If the fault persists, contact a professional.

5. Vokera Boiler Keeps Switching Off

If your boiler keeps shutting down, possible reasons include:

Low System Pressure – Check if the pressure is below 1 bar.

Blocked Heat Exchanger – A power flush may be needed.

Faulty Thermostat – The thermostat may be misreading temperatures.

Pump Failure – Water circulation issues can cause shutdowns.

👨‍🔧 Real-World Case: A customer in Paisley had a Vokera boiler that kept turning off. After a thorough inspection, I found that sludge build-up in the system was restricting flow. A full system flush solved the problem, restoring proper heating.

6. Boiler Not Producing Hot Water?

If your heating works but there’s no hot water, the issue could be:

Diverter Valve Failure – The valve directs hot water to either the taps or radiators. A faulty valve may be stuck.

Thermistor Issues – If the thermistor is faulty, the boiler won’t regulate temperature correctly.

Airlocks in Pipes – Bleeding the system can sometimes resolve this.

🛠 Quick Fix: Check if your boiler is set to the correct mode. If the issue continues, a professional diagnosis is needed.

7. When to Call a Professional Gas Engineer in Glasgow & Nearby Areas

While some minor issues can be resolved by homeowners, others require expert attention. If your Vokera boiler:

Shows persistent fault codes

Frequently loses pressure

Leaks water or gas

Is over 10 years old and inefficient

…it’s time to call a Gas Safe registered engineer.

🏆 Why Choose Me? I have extensive experience repairing Vokera boilers across Glasgow, Clydebank, Bearsden, Milngavie, Scotstoun, Anniesland, Knightswood, Partick, Maryhill, Paisley, Renfrew, and surrounding areas. Whether you need repairs, servicing, or a new boiler installation, I provide reliable, expert service at competitive rates.

📞 Call Now: 07968 047 977

📧 Email: duncan-1stclassgas@outlook.com

🌍 Website: www.repairmyboilerglasgow.co.uk