Keston Boiler Repairs Swansea & South Wales

Keston boiler logo

Keston Boilers is a specialist British manufacturer based in London, known for producing high-quality condensing boilers since 1961. Keston was one of the first companies in the UK to develop condensing technology, and their boilers are favoured for their durability and efficiency. Although less common than mainstream brands, we see Keston boilers in properties across Swansea and South Wales, and our engineers are well-versed in their unique designs and components.

Keston Boiler Repair

When your Keston boiler breaks down, you need an engineer who knows the brand inside out. Our Gas Safe Registered engineers have repaired hundreds of Keston boilers across Swansea and South Wales. We carry common replacement parts on our van, which means many Keston repairs can be completed on the first visit — getting your heating and hot water back up and running as quickly as possible.

Common Keston Boiler Problems

Through years of working on Keston boilers, we have become familiar with the faults these models are most prone to. Here are the issues we see most often:

  • Ignition lockout — the ignition transformer or electrode can fail, preventing start-up
  • Air pressure switch faults — the APS can stick or the silicone tubing can perish
  • Condensate pump issues — some Keston installations use external condensate pumps that can fail
  • Gas valve faults — the modulating gas valve can develop issues affecting flame stability
  • Burner degradation — the stainless steel burner can distort after many years of high-temperature operation
  • PCB errors — control board faults on older models may require specialist repair or replacement

If your Keston boiler is displaying a fault code or behaving unusually, do not ignore it. Early diagnosis can prevent a minor issue from becoming an expensive repair.

Keston Boiler Servicing

An annual boiler service is essential for keeping your Keston boiler running safely and efficiently. During a service, we carry out a comprehensive set of checks including flue gas analysis, gas pressure testing, electrical connection inspection and a full visual examination of all components. Regular servicing not only extends the life of your Keston boiler but is also a requirement for maintaining most manufacturer warranties.

Keston Models We Work On

We service and repair the full range of Keston boilers, including:

  • Keston C40
  • Keston C55
  • Keston Celsius 25
  • Keston Heat 45
  • Keston Heat 55
  • Keston System 30

Even if your specific Keston model is not listed above, we can almost certainly help. Our engineers have experience with both current and discontinued Keston boilers.

Keston Boiler Installation

As well as repairs and servicing, we install new Keston boilers throughout Swansea, Neath, Port Talbot and the surrounding areas. Whether you are replacing an old boiler or fitting a Keston boiler in a new location, we handle the complete installation including any necessary pipework modifications, flue fitting and system flushing. We will help you choose the right Keston model for your property size and hot water demands, and ensure everything is installed to manufacturer specifications and Gas Safe standards.

We also specialise in Viessmann, Vaillant and Worcester boiler repairs across South Wales.

For Keston boiler repairs, servicing or installation across South Wales, call us on 07881 286 602. We cover Swansea, Llanelli, Carmarthen, Neath, Port Talbot and surrounding areas. See our boiler installation service, browse all brands we work with, or get in touch for a free quote.