Boiler Replacement in Lanarkshire & Glasgow

If your boiler is unreliable, inefficient, or costing too much to run, it may be time for a boiler replacement.

Upgrade to a Reliable, Energy-Efficient Heating System

At Thistle Boilers, we specialise in fast, affordable boiler replacements across Lanarkshire, Glasgow, and the Central Belt, helping homeowners upgrade to modern, energy-efficient systems with minimal disruption.

Signs to look out for

Is it time to replace your boiler?

Many homeowners wait until their boiler breaks down completely. Acting early saves you money, and saves you a cold house in the middle of winter.

  • 10 to 15+ years old Older boilers lose efficiency every year
  • Frequent breakdowns Repair bills that keep coming back
  • Rising energy bills Paying more to heat the same home
  • Patchy heat or hot water Cold radiators or water that runs lukewarm
  • Strange noises Banging, whistling or gurgling
  • Hard-to-find parts Older models are no longer supported
Thistle Boilers engineer replacing an old boiler with a new energy-efficient model
Gas Safe registered Reg. no. 938292

Recognise one or more of these?

Replacing your boiler could be the most cost-effective long-term fix. We'll give you honest advice and a clear, fixed quote.

Simple and hassle-free

Our boiler replacement process

From your first call to long after your new boiler is fitted, here's exactly what to expect.

  1. Free home survey & quote

    We look at your current system and your heating needs, then give you a clear, fixed quote.

  2. Expert recommendations

    We recommend the best replacement boiler for your home, how you use it, and your budget.

  3. Safe removal of your old boiler

    Your existing boiler is carefully taken out and disposed of safely.

  4. Professional installation

    Our Gas Safe registered engineers fit your new boiler to the highest standard.

  5. Testing & setup

    We check everything is running efficiently and show you how to get the most from your new system.

  6. Ongoing support

    We follow up after the install and we're here for any questions or future servicing.

Combi, system or regular

Choosing the right boiler for your replacement

Replacing your boiler isn't just a like-for-like swap. It's a chance to choose a system that suits your home, your hot water use and your energy bills. Take a look at the gas boilers we install, or let us recommend the right one on your free survey.

  • Ideal Logic combi boiler Most popular

    Combi boiler replacement

    Instant hot water on demand, with no separate tank or cylinder. Combis free up space, simplify your system and only heat water when you need it.

    Best suited for

    • Flats and smaller homes
    • Properties with limited space
    • Lower to moderate hot water use
  • Worcester Bosch 1000 system boiler

    System boiler replacement

    Works with a hot water cylinder, so several taps and showers can run at once without a drop in pressure. A great upgrade for growing households.

    Best suited for

    • Larger homes
    • Families with higher hot water use
    • Properties with more than one bathroom
  • Ideal regular boiler

    Regular boiler replacement

    Also called conventional or heat-only boilers. If your home already has a cold water tank and hot water cylinder, a like-for-like swap is often the simplest, most cost-effective option.

    Best suited for

    • Older or traditional heating systems
    • Homes with existing tanks and cylinders
    • Keeping system changes to a minimum

Not sure which you need? We'll recommend the right boiler when we survey your home, free and with no obligation.

Book a free survey

Why upgrade

Benefits of replacing your boiler

Swapping an old boiler for a modern A-rated model can make a real difference to your home's energy performance.

  • Lower energy bills

    Modern boilers turn more of your gas into heat, so less money goes up the flue.

  • Reliable heat & hot water

    Warm radiators and steady hot water, whenever you need them.

  • Fewer breakdowns

    New parts and a manufacturer's warranty mean fewer repair bills.

  • Quieter running

    No more banging or gurgling. Today's boilers are barely noticeable.

  • Smaller carbon footprint

    Using less gas is better for the planet as well as your wallet.

  • A more comfortable home

    Even, dependable warmth in every room, all year round.

Local to you

Areas we cover

Based in Bellshill, we replace boilers throughout Lanarkshire, Glasgow and the wider Central Belt. As a local company we know the homes in the area, and we pride ourselves on prompt response times, flexible appointments and consistent, quality workmanship.

Whether you're in the city centre or a surrounding town, you get the same high standard of service from first quote to final installation.

We cover

  • Bellshill
  • Hamilton
  • Motherwell
  • East Kilbride
  • Uddingston
  • Glasgow
  • Lanarkshire
  • The Central Belt

Looking for an expert boiler replacement nearby? Get in touch and we'll let you know if we cover your area.

Get a free quote