Gas Safe registered — Reg. No. 919881 Mon–Sat 7am–8pm · Emergency cover 24/7
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Gas Safe 919881 · Bromley

Boiler repair in Bromley

Gas Safe registered heating engineers covering the London Borough of Bromley. £110 covers diagnosis and the first hour on site, parts are quoted for approval before anything is fitted, and we publish what the common repairs cost.

Gas Safe registered engineer diagnosing a wall-mounted Worcester Bosch combi boiler in a Bromley kitchen, flue gas analyser in hand.
Diagnosis and first hour
£110
Call before midday
Same-day visit
Parts and labour
12-month guarantee
Gas Safe registered
919881

Get a free quote

Tell us what you need and we’ll come back to you with a price — usually within the hour.

Cost

What it costs

Most boiler faults in Bromley homes come down to a handful of causes, and a good number of them are the water rather than the boiler. This page sets out what we charge, what the common repairs cost, what the fault code on your display means, and the point at which spending money on an old appliance stops being sensible. If your boiler is locked out now, ring us. The rest can wait.

Part prices include labour and VAT. Six of the seven firms ranking for boiler repair in Bromley publish nothing at all, so these are here to be compared — and note that several fixed-price offers cover the visit only.
JobPriceWhat it involves
Diagnosis and first hour on site £110 No separate call-out fee on top. Where the fault is a job rather than a part, it is usually sorted inside the hour.
Out-of-hours, weekend or bank holiday £120 First hour on site. Parts stay at the weekday rate — nothing doubles because it is a Sunday.
Low pressure — sensor, filling loop or leak trace from £145 A failed pressure sensor, a passing filling loop, or a leak found at a visible joint.
Expansion vessel recharge or replacement from £180 The usual answer to a boiler needing topped up every fortnight.
Thermistor or NTC sensor from £150 Behind most overheat lockouts, and boilers that fire, run ninety seconds and cut out.
Pump replacement from £245 Seized or noisy circulation pump. Where it seized because the system is sludged, we will say so.
Diverter valve — heating fine, no hot water from £265 The most common combi fault locally. Hard water scales the valve until it stops moving across.
Plate heat exchanger replacement from £295 Hot water that never gets properly hot. Almost always limescale.
Fan replacement from £320 Grinding on start-up, or a fan-speed lockout that clears on reset and returns.
PCB replacement from £345 Past ten years old, this is where repair or replace deserves a proper conversation.
Gas valve replacement from £385 Gas-rated and recommissioned afterwards with a flue gas analysis. Not a part to fit without one.

What changes the price

What the £110 buys

An engineer at the property and the fault traced properly rather than guessed at, with the repair done if it is a job rather than a part. It is charged whether or not the boiler turns out to be fixable. Diagnosis has a cost, and firms claiming otherwise have buried it somewhere else.

If we can’t fix it that visit

You get the fault in writing, the part number, a fixed price and a date. If the part is obsolete or the repair uneconomic you will hear that plainly, and the £110 comes off a replacement quote. There is never a second diagnostic fee.

Parts are quoted before fitting

We ring you with the part, the price and what it will do before anything is ordered. Nothing gets fitted on the assumption you will pay for it once it is in.

Age and parts availability

Past about fifteen years, availability decides more than the fault does. Some manufacturers hold spares for a decade after a model is discontinued and some do not, and we would rather tell you on day one than after two visits.

Fault codes

What the code on your display actually means

Not one page ranking for boiler repair in Bromley names a single manufacturer fault code, which is odd, because it is the first thing anyone reads off the boiler before picking up the phone. A code narrows the search rather than diagnosing the fault, so treat a fixed price quoted off a code down the phone with caution.

The fault codes we attend most often across Bromley
CodeWhat it meansWhat usually fixes it
Worcester EA 227 Flame not detected, ignition lockout Electrode and lead first, then the condensate run. A frozen condensate is the commonest cause in January, especially where an external run was done in 22mm rather than 32mm. From £110.
Worcester E9 219 Overheat, the limit thermostat has tripped Usually poor circulation: seized pump, blocked heat exchanger, or a system thick with magnetite. Changing the sensor without asking why it tripped means seeing us again. From £150.
Vaillant F.75 No pressure change when the pump starts Classic ecoTEC fault. Nearly always a flat expansion vessel or a failed pressure sensor, occasionally both. From £180.
Vaillant F.28 Ignition failure on start-up Gas supply, electrodes or gas valve. We gas-rate at the meter before condemning a valve, because a 15mm supply serving a modern boiler causes this with nothing wrong inside the case. From £150.
Vaillant F.22 / Glow-worm F.22 Low water pressure, dry fire protection Topping up is a symptom, not a fix. Either the system is losing water or the expansion vessel has failed. From £145.
Ideal L2 Ignition lockout after five attempts Logic and Vogue. Electrodes, condensate blockage or gas supply, in that order of likelihood. From £110.
Baxi E119 System pressure below minimum On 600 and 800 series. Expansion vessel, a relief valve passing to outside, or a leak on the system. From £145.

Resetting more than twice

A lockout is a safety response, not a glitch. Resetting repeatedly to squeeze another day out of a boiler is how a cheap electrode becomes an expensive gas valve.

A code is a symptom

Manufacturers group several different failures behind one number, so two boilers showing the same code can need entirely different parts. Plenty of what we attend shows no code at all.

When a repair stops being worth it

Our rule of thumb: if one repair costs more than a third of a replacement and the boiler is past twelve years old, the money is better spent on the new one. Below that, repair it and carry on — a fifteen-year-old Worcester needing a thermistor is a £150 job, not a reason to spend two thousand pounds. If it does come to a replacement, the £110 comes off the price.

Local

Why Bromley boilers fail the way they do

Fault patterns follow the housing stock and the water supply, and both are specific to this borough. Every page ranking above us for boiler repair in Bromley is a template with the town name swapped in, one of them nearly identical to its Orpington version and run from an office in Surrey.

Hard water and limescale

Bromley sits in a hard-water supply zone, and it is the biggest single reason combis fail here. Scale plates out inside the hot water heat exchanger until the water is lukewarm at best, and it seizes diverter valves in the heating position, which is why "heating works but no hot water" is such a common local call. Where we replace a scaled plate exchanger we usually suggest a scale reducer on the mains, or the new one goes the same way inside five years.

Conservation areas and flues

The borough has more than forty conservation areas, including Petts Wood, which carries an Article 4 direction removing permitted development rights, along with Chislehurst, Keston, Farnborough Village, Chelsfield, Bickley Park and Shortlands. A repair becomes a planning question when the flue has to be re-sited, extended or replaced on a street-facing elevation. There is nearly always a compliant answer, and we raise it beforehand rather than halfway through.

Interwar semis and back boilers

Petts Wood, Crofton, West Wickham and Hayes are full of 1930s semis, and plenty still have a back boiler behind the fireplace or a boiler moved into a loft conversion in the nineties. Back boilers are largely unrepairable now, parts having stopped being made years ago, so the honest answer there is a replacement.

Victorian terraces and microbore

The terraces through Penge, Anerley and parts of Beckenham were largely plumbed in 8mm and 10mm microbore. It blocks readily once a system has sludged, producing faults that look like boiler faults: cold radiator bottoms, a pump working far harder than it should, overheat lockouts.

Larger stock in Bickley and Chislehurst

The bigger detached houses run system boilers with unvented cylinders, so a hot water fault presents differently: a spent immersion, a failed cylinder thermostat, a two-port valve stuck shut, or an expansion vessel on the cylinder rather than the boiler. Unvented work needs a separate qualification, and we hold it.

Flats, communal flues and parking

Flats around Bromley South, Bromley North and the High Street often run on communal flue systems, which changes what can be touched and can need freeholder consent. Controlled parking zones around those stations, Beckenham Junction and Orpington decide whether we can leave a van close enough to run parts, so tell us if you have a permit or a driveway.

The job

How it works

  1. Ring us and read us the code

    You get an engineer on the phone rather than a call centre. Have the make, model and whatever is on the display. Call before midday on a weekday and we aim to reach you the same day; later than that, normally the next morning. No heating in a household with a baby, an occupant over seventy or a medical need goes to the front of the queue.

  2. Diagnosis on site

    Codes read off the boiler’s own error history, system pressure and flow checked, the appliance gas-rated at the meter where it matters, and a flue gas analysis run if combustion is in question. That is what the £110 covers.

  3. A price before anything is fitted

    The fault, the part, the price and the timescale, and nothing happens until you say yes. If the repair is not worth doing on the boiler you have, you will hear that too — including when the answer is to repair it now and leave the replacement for another year.

  4. The repair, then recommissioning

    Worcester Bosch, Vaillant, Ideal, Baxi and Glow-worm spares live on the van, so most faults are fixed first visit. Afterwards the boiler is recommissioned: gas rate confirmed, flue gas analysis taken, system pressure set, controls checked and the case resealed. A part fitted without recommissioning is half a job.

  5. Paperwork before we leave

    A written job record showing our Gas Safe registration, the fault, the parts fitted and the readings taken. Where the manufacturer requires it the Benchmark book is signed, since an unstamped book is a common reason warranty claims get refused. Landlords get the CP12 updated after a mid-tenancy repair.

Included

What comes as standard

  • Diagnosis and the first hour on site for £110, with no separate call-out fee
  • A fixed price for parts and labour before anything is fitted
  • Van stock for Worcester Bosch, Vaillant, Ideal, Baxi and Glow-worm
  • Full recommissioning — gas rate, flue gas analysis and system pressure
  • Benchmark logbook entry where the repair requires one to keep the warranty valid
  • A written job record showing Gas Safe registration 919881, the fault and the readings
  • CP12 updated where a repair is carried out mid-tenancy for a landlord
  • 12-month guarantee on parts we supply and on our own workmanship
  • An honest repair-or-replace answer, with the £110 credited against a replacement

Questions

Boiler repair questions

How much should a boiler repair cost?

Ours is £110 for diagnosis and the first hour, with no call-out fee on top. Parts and labour run from about £145 for a pressure sensor to £385 for a gas valve, and we publish the common ones rather than making you ring to find out. Nationally most repairs land between £100 and £500. Compare carefully, because several low headline prices cover the visit only.

Will home insurance cover a boiler repair?

Standard buildings and contents cover almost never pays for a breakdown, because breakdown counts as wear and tear rather than an insured event. Damage from something sudden and accidental, such as an escape of water, can be claimable. Separately, many insurers sell home emergency or boiler cover as an add-on, which is a service contract rather than insurance. Check the excess and the annual repair limit, as both are often lower than one major part.

Is it illegal to sell a house with a broken boiler?

No. There is no requirement for a boiler to be working when you sell, and none to replace it. What you cannot do is misrepresent it, since the property information form has to be answered truthfully. In practice buyers negotiate rather than walk away. What does cause trouble at the point of sale is unnotified gas work: if a past installation was never notified to Building Control, the buyer’s solicitor will want a compliance certificate or an indemnity policy. Renting is different, as a landlord must hold a current CP12.

Why do I have heating but no hot water?

On a combi it is nearly always one of two parts, and in Bromley it is nearly always limescale that caused it. A diverter valve seized in the heating position stops hot water reaching the tap at all, a repair from £265. A scaled plate heat exchanger gives you water that never gets properly hot, from £295. On a system boiler with a cylinder the causes differ: a failed cylinder thermostat, a stuck two-port valve, or a spent immersion.

Why does my boiler keep losing pressure?

The water is going somewhere. Three usual answers: a failed expansion vessel, which pushes water out through the pressure relief valve each time the system heats up, so look for a drip from a small copper pipe outside; a passing relief valve; or a leak, often at a radiator valve, a towel rail or under a floor. Topping up weekly is not a fix, because every refill brings fresh oxygen and hardness into the system.

Do you do same-day and emergency boiler repair?

Yes, and here is the actual commitment rather than a 24/7 badge. Call before midday on a weekday and we aim to reach you that day; call later and it is normally the next morning. Outside 7am to 8pm, on a Sunday or on a bank holiday the first hour is £120 rather than £110, with parts at the usual weekday rate. Households with no heating and a young baby, an elderly occupant or a medical need are prioritised. If you can smell gas, ring 0800 111 999 before you ring us.

Should a 15 or 20 year old boiler be repaired or replaced?

It depends on the part rather than the age. A twenty-year-old boiler needing a thermistor or a pump is worth repairing at £150 to £245. The same boiler needing a heat exchanger, a PCB or a gas valve is a different conversation, because that is three or four hundred pounds spent on an appliance near the end of its life. Past about fifteen years, parts availability starts making the decision for you.

Do I get any paperwork after a boiler repair?

You should, and almost nobody locally explains this. From us you get a written job record with our Gas Safe registration number, the fault found, the parts fitted and the commissioning readings. Where a repair involves a component the manufacturer requires logging, the Benchmark book is completed — an unstamped book is one of the reasons Worcester and Vaillant refuse warranty claims. Straightforward repairs need no Building Regulations notification, but replacing a flue or relocating the appliance does.

Does a boiler repair need planning permission in a conservation area?

A repair inside the property does not. It matters when a flue has to be replaced, extended or re-sited on an elevation facing the street. Bromley has more than forty conservation areas, and Petts Wood carries an Article 4 direction removing permitted development rights, so what is automatic elsewhere is not automatic there. Chislehurst, Keston, Farnborough Village, Chelsfield, Bickley Park and Shortlands sit in the same territory, and listed buildings are stricter again.

Coverage

Where we work

Across the London Borough of Bromley — BR1 to BR7 — plus Penge, Sydenham and Crystal Palace.

No heating? No hot water?

Get a fixed price from a Gas Safe registered engineer — not an answering service. Same-day appointments across Bromley most days.