Central heating and boilers in Lanark

New boilers supplied and installed, breakdowns diagnosed, radiators replaced and tired systems flushed and rebalanced — sized properly for cold Clydesdale winters rather than to the nearest brochure figure.

01555 668284 Request a quote

Quick answer

How much does a new boiler cost in Lanarkshire?

A straight combi swap in a Lanarkshire home typically runs from about £2,000 to £2,900 fitted, and converting a conventional system with a tank and cylinder to a combi is usually £3,000 to £4,200. Caldwellside Plumbing quotes after a survey — call 01555 668284.

Combi swap: from around £2,000 fitted
System conversion: around £3,000–£4,200
Heat loss calculated, not guessed
Magnetic filter and flush included on installs

What this covers

New boiler supply and installation
Boiler repairs and annual servicing
Full central heating system installs and upgrades
Radiator and towel rail replacement
Power flushing and magnetic system filters
Smart thermostats and heating controls

Heating

Heating questions, answered properly

Which boiler is right for my house?

A combi suits most one-bathroom homes with decent mains pressure. Larger houses, properties with two or more bathrooms, and rural homes on weak mains are usually better served by a system boiler with an unvented cylinder.

Plenty of houses around Lanark, Biggar and the outlying villages have poor incoming mains flow. Fitting a big combi to a weak main gives you a lukewarm shower no matter how good the boiler is, so we measure flow rate before recommending anything.

Why is my heating not getting hot / some radiators cold?

Cold at the top of a radiator is trapped air — bleed it. Cold at the bottom is sludge build-up, which needs flushing. Whole zones cold usually points to a failed pump, diverter valve or thermostat.

Cold top, warm bottom — bleed the radiator
Cold bottom, warm top — magnetite sludge, needs a flush
One room never warm — balancing or a closed lockshield valve
Hot water but no heating — diverter valve or motorised valve
Boiler locking out on cold mornings — frozen condensate pipe
Pressure dropping repeatedly — a leak or failed expansion vessel

Is a power flush worth it?

It is worth it when radiators are sludged, the system is noisy or a new boiler is going onto old pipework. It is not a fix for a system with a genuine circulation fault or an undersized pump.

We fit a magnetic system filter on every boiler installation and flush the system beforehand, which protects the new heat exchanger and keeps the manufacturer's warranty valid.

How often should a boiler be serviced?

Annually. Yearly servicing is a condition of nearly every manufacturer's warranty, and it catches the small faults — a sticking valve, a weak pump, a corroding seal — before they become a January breakdown.

Landlords need an annual gas safety check on every appliance; we can carry the service and the certificate out in the same visit.

Costs

What heating work typically costs

Guide figures for the Lanark and Clydesdale area. Every job is quoted properly before work starts — these are here so you know roughly what to expect.

Job	Typical guide price
Boiler service	From around £85
Boiler repair / diagnostic visit	From around £95 plus parts
Combi boiler swap, fitted	From around £2,000
Conventional to combi conversion	Around £3,000–£4,200
Radiator replacement	From around £150 plus the radiator
Power flush	From around £450 depending on radiator count

Guide prices only, excluding VAT where applicable, and dependent on access, materials and the condition of existing pipework.

Need heating work in Lanark or Clydesdale?

Central heating installation, repair and upgrades — new boilers, radiator replacements, power flushing and smart controls.

Monday to Friday, with emergency call-outs by arrangement

01555 668284 Request a quote

Heating FAQs

How much does a new boiler cost?

Cost depends on the boiler type, output, whether the system layout changes and how much pipework and flue work is needed. We survey the property, confirm the right size boiler and give a fixed written price including installation, controls and commissioning.

Why are my radiators cold at the top or bottom?

Cold at the top usually means trapped air and needs bleeding. Cold at the bottom points to sludge and corrosion debris settling in the radiator, which needs flushing and a magnetic filter fitted. Cold across whole zones is more often a pump or valve fault.

Should I repair or replace my boiler?

As a rule, repair is sensible for a boiler under about ten years old with available parts and a good service history. Beyond that, repeated repair costs and poor efficiency usually make replacement better value. We will tell you honestly which applies to yours.

What is power flushing and do I need it?

Power flushing forces cleaning fluid through the system at high flow to remove sludge and corrosion debris. It is worth doing when radiators are cold at the bottom, the water runs black, or before fitting a new boiler onto an older system.