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DMK Plumbing and Heating, Cardiff

Emergency Boiler Repair in Cardiff

No heating or no hot water? Our Gas Safe registered engineers repair all major boiler brands across Cardiff, usually the same day, with the price agreed before we start.

  • Same-day boiler repairs wherever we can
  • All major brands including Worcester Bosch, Vaillant and Ideal
  • Common spare parts carried in the van
  • Fixed price agreed before any work begins
07868 470 791
Wall mounted combi boiler being repaired by a Gas Safe engineer in Cardiff
Gas Safe Register approved engineersWhich? Trusted Traders endorsed memberCheckatrade approved member
9.923 Checkatrade reviews

Boiler faults we fix

Most breakdowns come down to a handful of common causes. We diagnose properly rather than guessing, so you are not paying for parts the boiler did not need.

  • No hot water or no heating at all
  • Boiler locking out or showing a fault code
  • Losing pressure or needing constant topping up
  • Pilot light or ignition failure
  • Leaking from the boiler case or pipework
  • Banging, gurgling or kettling noises
  • Thermostat and timer faults
  • Frozen condensate pipes in cold weather

Repair or replace? An honest answer

If a boiler is old, unreliable and needs an expensive part, throwing money at it rarely makes sense. If it has years left, a repair is the sensible choice. We give you both costs and our honest opinion, and we never pressure anyone into a new boiler.

If you do decide to replace it, we can quote for a new boiler installation with a free survey first.

Before you call, two quick checks

Look at the pressure gauge — if it is well below 1 bar, the system has lost water. Check the thermostat is switched on and calling for heat, and that the boiler has power and gas. In freezing weather, a blocked condensate pipe is a very common cause and often shows as a lockout code.

Note down whatever you find and tell us when you ring. It genuinely speeds up the repair.

Looking for something else? See all of our plumbing and heating services or check the areas we cover across Cardiff.

Book a Boiler Repair

Tell us the boiler make, model and any fault code and we will call you back with the next available slot.

We use your details only to respond to your enquiry.

Boiler down? Get it looked at today.

Call now with the make, model and fault code and we will tell you what is likely wrong and when we can be with you.

07868 470 791

Questions

Frequently Asked Questions

Can you repair my boiler the same day?

In most cases yes. We hold common spares in the van and we keep space for breakdowns, so a straightforward fault is often fixed on the first visit.

Which boiler brands do you work on?

We repair all the major domestic brands, including Worcester Bosch, Vaillant and Ideal, on both gas and LPG systems.

My boiler is showing a fault code — is that useful?

Very. Tell us the make, model and code when you call and we can usually identify the likely part before we arrive, which saves a return visit.

Is it worth repairing an old boiler?

Sometimes, and sometimes not. We will tell you what the repair costs, how reliable the boiler is likely to be afterwards, and what a replacement would cost, then leave the decision to you.

My boiler keeps losing pressure — what causes that?

Usually a small leak somewhere on the system, a failed pressure relief valve or a tired expansion vessel. We trace the cause rather than just topping it up, so the problem does not keep coming back.

What customers say

Rated 9.9 on Checkatrade

From 23 verified customer reviews.

Checkatrade approved member
  • Brilliant service from a knowledgeable and friendly engineer. Highly recommended

    Ed Hutchinson · 28/05/2024

  • Fantastic service! arrived on time fixed our problem right away. I highly reccomend this company.

    Grant Wallett · 28/05/2024

  • Super quick response. Fixed an emergency water leak promptly and efficiently. Will definitely use again.

    Hasan R · 24/05/2024

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