Wall-mounted Worcester combi boiler with copper pipework and isolation valves repaired in an Edinburgh home

Boiler repair · Gas Safe registered

Boiler repairin Edinburgh, diagnosedproperly the first time

No heating or no hot water? A Gas Safe registered engineer with 20+ years on the tools finds the actual fault, tells you the cost before starting, and backs the repair with a 12-month workmanship guarantee.

Request an Estimate 07788 373160

Reactive call-outs taken on · Owner-led by Lewis Bowman · £2m insured

Gas Safe

Registered engineer on every call-out

Reactive

Urgent breakdowns taken on

20+ yrs

Fault-finding on domestic boilers

12 months

Workmanship guarantee on the repair

£2m

Public liability insurance

The service

Find the fault,not the symptom

What it covers

Boiler repair covers fault-finding and component replacement on domestic gas boilers: lockouts and fault codes, ignition and flame failure, no heating or no hot water, low pressure, leaks, noise, pumps, diverter valves, PCBs, fans, gas valves, thermistors, pressure sensors, expansion vessels and condensate blockages. It also covers the system faults that look like boiler faults, which is a large share of the call-outs we attend.

Who it's for

For Edinburgh households with a boiler that has stopped, is cutting out, is losing pressure, or is producing heat inconsistently. Also for anyone who has already had a part fitted elsewhere and is still living with the same fault, because that usually means the diagnosis stopped one step too early.

When you need it

Call as soon as behaviour changes. A boiler that locks out and resets, a pressure gauge that keeps falling, hot water that runs lukewarm, kettling or banging from the appliance, a fault code that clears and returns, or a discharge pipe outside that keeps dripping; all of these are the appliance telling you something before it stops entirely, usually on the coldest day of the year.

Why it needs doing properly

Boilers are sealed gas appliances. Working on one legally and safely requires Gas Safe registration, and diagnosing one properly requires reading the whole system: gas rate, combustion, water pressure, flow and return differential, control wiring and water quality. Swapping parts against a fault code alone is how people end up paying for a PCB when the real problem was a blocked condensate or a system full of sludge.

Leave it and it grows

Why an intermittentfault gets expensive

A boiler rarely fails all at once. It degrades, and every week it runs in a degraded state it does damage that is more expensive than the original repair.

What it costs if ignored

A system carrying magnetite grinds pump bearings and blocks the heat exchanger, one of the costliest components in the appliance.
Repeated lockouts and resets stress ignition and gas valve components that were designed for normal cycling.
Low pressure that is topped up week after week dilutes inhibitor and hides an active leak that is soaking something.
Kettling means overheating inside the heat exchanger, which shortens its life every time it happens.
A blocked condensate can freeze on an external run and shut the boiler down completely in the coldest weather.
A boiler nursed through one more winter usually fails at the point when replacement is least convenient and least affordable.

Common mistakes we're called out to

Resetting a lockout repeatedly instead of finding out why it locked out.
Topping the pressure up from the filling loop as a routine, which masks the leak causing it.
Buying a part off the internet based on a fault code and fitting it without testing the cause.
Allowing unregistered work on a gas appliance, which is both illegal and uninsurable.
Ignoring a service history, then discovering the manufacturer guarantee lapsed years ago.
Assuming cold radiators mean a broken boiler when the actual fault is a seized motorised valve.

Our process

How the job runs,step by step

Step 1

Inspection

We start with the appliance and the system together: fault code history, pressure, flow and return temperatures, valve and pump operation, condensate route and control wiring.

Step 2

Diagnosis

The fault is confirmed by testing, not assumed from a code. You are told what has failed, what caused it, and whether anything else is on the way out.

Step 3

Agreed price

You get the cost of the repair before it starts, and where a boiler is genuinely at the end of its economic life we tell you that plainly rather than selling a repair that will not hold.

Step 4

Repair execution

Parts replaced with correct components, gas work carried out under Gas Safe registration, and the surrounding system corrected where it caused the failure.

Step 5

Testing and verification

Gas rate and combustion checked, pressure set, controls run through a full cycle, and every radiator verified so we know heat is actually reaching the house.

Step 6

Completion and guarantee

We explain what failed and how to avoid it recurring, and cover the workmanship with our 12-month guarantee.

What you get out of it

Specific outcomes,not vague promises

Heat back fastest

Reactive call-outs and phone-first diagnosis mean less time spent cold and fewer wasted visits.

Right part, once

Testing before replacing avoids paying for components that were never the cause.

Safe by registration

Gas Safe registered work on a sealed gas appliance, with £2m public liability cover behind it.

Root cause addressed

If sludge, a seized valve or a leak caused the failure, you hear about it, otherwise the same part fails again.

Honest repair-or-replace advice

When repair no longer makes financial sense you get told, with the installation option priced alongside.

Twelve-month cover

Our workmanship guarantee applies to the repair, with manufacturer warranty on parts on top.

In detail

Common faults andwhat actually causes them

Most domestic boiler call-outs in Edinburgh fall into a small number of families of fault. Recognising which family you are in saves hours of guesswork.

No heating or no hot water

Could be the boiler, but very often is not. A seized three-port or two-port motorised valve, a failed pump, a dead room thermostat, a programmer that has lost its schedule, or a wiring centre fault will all present exactly like a broken boiler. We check the controls chain before condemning an appliance.

Pressure loss and refilling

Three usual causes: an active leak on the system, a waterlogged expansion vessel, or a pressure relief valve passing water out through the external discharge pipe. Each has a distinct signature: a dripping discharge outside points strongly to the third, and a vessel that has lost its charge can be tested and often recharged.

Lockouts, ignition and flame failure

Repeated lockouts point at ignition leads and electrodes, the fan, the gas valve, flue condensate, a blocked condensate trap or, on older appliances, a failing PCB. Blocked condensate is very common in Edinburgh winters where the pipe runs externally.

Noise: kettling, banging and whining

Kettling is overheating in the heat exchanger, almost always caused by scale or sludge restricting flow. Banging on shutdown usually indicates air or overrun issues. A whine is normally the pump, either overspeed drawing air, or bearings on the way out.

Hot water faults on combis

Lukewarm water, water that runs hot then cold, or hot water only when the heating is on typically indicate a diverter valve or a plate heat exchanger scaling up, not a whole-appliance failure. These are repairable components with predictable costs.

When repair stops making sense

Age past roughly 12–15 years, obsolete parts, a failed heat exchanger, or a third significant repair in a short period. At that point we price the repair and a Worcester Bosch or Vaillant replacement side by side and let you decide with real numbers.

Questions

Boiler Repairquestions, answered

Anything we haven't covered, ask us directly on 07788 373160.

How quickly can you attend a boiler breakdown?

We take reactive call-outs for breakdowns. Phoning 07788 373160 is always the fastest route because we can often narrow the fault before arriving. Working hours are Monday to Thursday 8am to 4:30pm and Friday 8am to 1:30pm.

How much does a boiler repair cost?

It depends on the failed component, so we diagnose and then give you the price before carrying out the repair. Where a boiler is at the end of its life, we will show you the repair cost against a replacement cost rather than letting you spend money twice.

My boiler keeps losing pressure, is that serious?

It means water is leaving the system somewhere, or the expansion vessel or pressure relief valve has failed. None of those get better on their own, and repeatedly refilling dilutes the inhibitor protecting your heat exchanger. It is worth diagnosing early.

Should I repair or replace my boiler?

As a guide: under about ten years old with an available part, repair. Past 12–15 years with obsolete parts or a failed heat exchanger, replacement usually wins. We give you both numbers so the decision is yours, not a sales pitch.

Can you work on any make of boiler?

We work on domestic gas boilers generally and are accredited installers for Worcester Bosch and Vaillant, which means direct familiarity with those ranges and access to their guarantee scheme on new installations.

Is the repair guaranteed?

Yes. Our workmanship is covered for 12 months, and replacement parts carry their manufacturer's own warranty in addition.

Why did the same fault come back after another engineer fixed it?

Usually because the part was replaced without addressing what destroyed it: sludge in the system, a leak, a stuck valve or a control fault. We look for the cause as well as the failure, which is the only way a repair holds.

Is it safe to keep using a boiler showing a fault code?

If the appliance has locked itself out, leave it off and call. If you smell gas, do not touch electrical switches, turn the supply off at the meter, open windows and phone the national gas emergency line on 0800 111 999 immediately.

Do you cover my part of Edinburgh?

Yes, Edinburgh and the Lothians, including Leith, Musselburgh, Dalkeith, Corstorphine, Currie, South Queensferry, Bonnyrigg and Loanhead.

Will a service prevent breakdowns?

It substantially reduces them. Annual servicing catches wearing components, checks combustion and pressure, and keeps your manufacturer guarantee valid; most boiler emergencies we attend had no service history.

Get the heating back onwith the fault properly found

Gas Safe registered, 20+ years of fault-finding, 12-month workmanship guarantee. For a breakdown, calling is always faster than the form.