A broken boiler in North London doesn’t just mean cold showers — during the colder months it can make your home genuinely uninhabitable. AZ Plumbing Contractors are Gas Safe registered engineers covering Islington, Hackney, Camden and the surrounding North London boroughs. We diagnose and repair all boiler makes and models, from straightforward ignition faults to complex heat exchanger failures.

Common Boiler Problems We Fix

Our engineers are experienced in diagnosing and repairing a wide range of boiler faults, including:

• No heating or hot water — the most common call-out; often caused by a faulty diverter valve, failed pump, or broken motorised valve.
• Boiler lockout / error codes — we carry diagnostic tools to read fault codes across all major brands and identify the root cause quickly.
• Kettling and banging noises — usually caused by limescale or sludge build-up on the heat exchanger; can often be resolved with a chemical flush.
• Boiler pressure loss — a system leak, faulty pressure relief valve or expansion vessel failure can all cause pressure to drop.
• Pilot light keeps going out — typically a faulty thermocouple or gas valve issue.
• Boiler leaking water — can indicate a failed seal, pump seal, or pressure relief valve discharging.
• Radiators not heating up — could be a pump fault, airlocks, or sludge in the system restricting flow.
• Boiler cycling on and off — often caused by incorrect burner pressure settings, heat exchanger issues, or a faulty PCB.

Boiler Makes and Models We Service

Our Gas Safe engineers work on all major boiler brands, including Worcester Bosch, Vaillant, Baxi, Ideal, Potterton, Alpha, Glow-worm, Intergas, Viessmann, and Ferroli. Whether you have a modern combi, a system boiler or an older conventional (heat-only) unit, we have the knowledge and parts to get you back up and running.

Boiler Repair or Replacement?

Not every boiler fault is worth repairing. Before recommending a repair, our engineer will carry out a full assessment and give you an honest opinion. As a general rule of thumb, if your boiler is over 15 years old and the repair cost exceeds 50% of the cost of a new installation, replacement is often the more economical choice — particularly given the efficiency gains from a modern A-rated boiler.

If a new boiler is the better option, we can supply and install on the same or next working day in most cases. We offer boiler finance to spread the cost — contact us for details.

Boiler Repair Rates

Our boiler repair rates are available on our Rates page. We charge a diagnostic call-out fee that covers attendance and fault finding. Any repair work is quoted separately before we start — you will never receive a bill for work you haven’t agreed to. Boiler finance is available for new installations.

Gas Safe Registered Engineers

By law, all gas boiler work must be carried out by a Gas Safe registered engineer. Our registration number is 571510 — you can verify this at any time on the Gas Safe Register website. We never use unqualified sub-contractors for gas work.

Areas Covered

We carry out boiler repairs across North London, including Islington (N1), Hackney (E8), Camden (NW1), Highbury (N5), Finsbury Park (N4), Archway (N19), Holloway (N7), Stoke Newington (N16), Dalston, Canonbury, Barnsbury, Kentish Town, Tufnell Park and Clerkenwell.

Frequently Asked Questions

How quickly can you come out for a boiler repair?

We aim to attend same day or next day for boiler repairs in North London. For emergency call-outs where you have no heating or hot water, we offer a 24/7 service and will aim to attend within 60–90 minutes.

Will the engineer have parts on the van?

Our vans carry a wide range of boiler parts covering the most common faults on popular models. For less common parts we can usually source them same day or next day from our trade suppliers.

Do you offer a boiler service as well as repairs?

Yes — a regular annual service is the best way to prevent breakdowns and maintain your boiler warranty. See our Heating page for full details of our servicing packages.

Is boiler finance available?

Yes, we offer boiler finance for new installations. Please contact us directly to discuss the options available and to get a personalised quote.

A broken boiler in North London doesn’t just mean cold showers — during the colder months it can make your home genuinely uninhabitable. AZ Plumbing Contractors are Gas Safe registered engineers covering Islington, Hackney, Camden and the surrounding North London boroughs. We diagnose and repair all boiler makes and models, from straightforward ignition faults to complex heat exchanger failures.

Common Boiler Problems We Fix

Our engineers are experienced in diagnosing and repairing a wide range of boiler faults, including:

• No heating or hot water — the most common call-out; often caused by a faulty diverter valve, failed pump, or broken motorised valve.
• Boiler lockout / error codes — we carry diagnostic tools to read fault codes across all major brands and identify the root cause quickly.
• Kettling and banging noises — usually caused by limescale or sludge build-up on the heat exchanger; can often be resolved with a chemical flush.
• Boiler pressure loss — a system leak, faulty pressure relief valve or expansion vessel failure can all cause pressure to drop.
• Pilot light keeps going out — typically a faulty thermocouple or gas valve issue.
• Boiler leaking water — can indicate a failed seal, pump seal, or pressure relief valve discharging.
• Radiators not heating up — could be a pump fault, airlocks, or sludge in the system restricting flow.
• Boiler cycling on and off — often caused by incorrect burner pressure settings, heat exchanger issues, or a faulty PCB.

Boiler Makes and Models We Service

Our Gas Safe engineers work on all major boiler brands, including Worcester Bosch, Vaillant, Baxi, Ideal, Potterton, Alpha, Glow-worm, Intergas, Viessmann, and Ferroli. Whether you have a modern combi, a system boiler or an older conventional (heat-only) unit, we have the knowledge and parts to get you back up and running.

Boiler Repair or Replacement?

Not every boiler fault is worth repairing. Before recommending a repair, our engineer will carry out a full assessment and give you an honest opinion. As a general rule of thumb, if your boiler is over 15 years old and the repair cost exceeds 50% of the cost of a new installation, replacement is often the more economical choice — particularly given the efficiency gains from a modern A-rated boiler.

If a new boiler is the better option, we can supply and install on the same or next working day in most cases. We offer boiler finance to spread the cost — contact us for details.

Boiler Repair Rates

Our boiler repair rates are available on our Rates page. We charge a diagnostic call-out fee that covers attendance and fault finding. Any repair work is quoted separately before we start — you will never receive a bill for work you haven’t agreed to. Boiler finance is available for new installations.

Gas Safe Registered Engineers

By law, all gas boiler work must be carried out by a Gas Safe registered engineer. Our registration number is 571510 — you can verify this at any time on the Gas Safe Register website. We never use unqualified sub-contractors for gas work.

Areas Covered

We carry out boiler repairs across North London, including Islington (N1), Hackney (E8), Camden (NW1), Highbury (N5), Finsbury Park (N4), Archway (N19), Holloway (N7), Stoke Newington (N16), Dalston, Canonbury, Barnsbury, Kentish Town, Tufnell Park and Clerkenwell.

Frequently Asked Questions

How quickly can you come out for a boiler repair?

We aim to attend same day or next day for boiler repairs in North London. For emergency call-outs where you have no heating or hot water, we offer a 24/7 service and will aim to attend within 60–90 minutes.

Will the engineer have parts on the van?

Our vans carry a wide range of boiler parts covering the most common faults on popular models. For less common parts we can usually source them same day or next day from our trade suppliers.

Do you offer a boiler service as well as repairs?

Yes — a regular annual service is the best way to prevent breakdowns and maintain your boiler warranty. See our Heating page for full details of our servicing packages.

Is boiler finance available?

Yes, we offer boiler finance for new installations. Please contact us directly to discuss the options available and to get a personalised quote.