Gareth Williams Heating

Boiler Repair

Fast, reliable boiler repairs for all major brands across Newport and South Wales, with honest diagnosis and no unnecessary upselling.

Call Gareth’s mobile: 07770 693170. You speak to us, not a national call centre, and we agree the price before any work starts.

Boiler Repair

We repair all major boiler brands across Newport, Cardiff and South Wales, diagnosing faults such as no heating or hot water, pressure loss and leaks, with clear pricing agreed before any work begins.

What's included

  • All major boiler brands repaired
  • Common faults: no heat or hot water, pressure loss, leaks, noises
  • Clear price agreed before work starts
  • Gas Safe registered engineers
  • Honest advice on repair vs replace, with no pressure
Registered No. 233679Verify on the register →
  • ATAG Installer
  • Vaillant Advance Installer
  • Glow-worm Installer
  • Baxi Main

Every job is carried out by our Gas Safe registered engineers, installing and servicing boilers in Newport, Cardiff, Cwmbran and across South Wales since 2007.

What happens when you book

  1. Tell us what's happening

    Symptoms like no heat, no hot water, banging noises, pressure loss or an error code help us understand the likely cause before we arrive.

  2. In-person diagnosis

    A Gas Safe engineer needs to see the boiler to confirm the fault safely; it isn't something that can be diagnosed or fixed over the phone.

  3. Price agreed before work starts

    Once the fault is confirmed, we agree a clear price with you before any work begins.

  4. Repair carried out

    Where the fix needs a part we don't carry on the van, we'll tell you before we leave and arrange a return visit to complete it.

Boiler Repair: common questions

Which boiler brands do you repair?
All major brands. Our Gas Safe registered engineers diagnose the common faults, including no heating or hot water, pressure loss, leaks and unfamiliar noises.
Will I know the price before you start?
Yes. We agree a clear price with you before any work begins, so nothing appears on the bill that you have not already seen.
Should I repair my boiler or replace it?
It depends on the boiler's age, the cost of the parts it needs and how reliable it has been. We give you an honest view either way, with no pressure to replace a boiler that has years left in it.
Can you diagnose the fault over the phone?
We can narrow down the likely cause from what you describe, such as an error code, banging, or a pressure drop, but a Gas Safe engineer needs to see the boiler in person to confirm it and repair it safely.
What if the repair needs a part you don't have on the van?
We'll tell you before we leave, order the part and arrange a return visit to finish the job.
Do you only repair boilers you installed?
No. We repair all major boiler brands regardless of who installed them or how old the boiler is.
No heat? Call now01633 257230Get a quote