Same-day repairs across all 32 London boroughs. Fixed prices agreed before work begins. Fully insured, DBS-checked, and backed by a 12-month workmanship guarantee.
Call-out
Guarantee
Average reply under 10 minutes. No obligation.
Reg. No. XXXXXX
Fully insured
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All engineers
On every repair
Readout
Symptom
Likely cause
HEAT —-
Failed diverter valve, broken diaphragm, airlock or thermostat fault.
0.4 BAR
Boiler losing pressure — repressurising every few days just to keep it running.
Small leak in pipework, failing pressure relief valve or waterlogged expansion vessel.
LEAK
Boiler leaking water — drips or pooling under the unit. Never ignore it.
Corroded internals, failed seals or excess pressure — escalates fast into water damage.
IGN LOCK
Limescale or sludge on the heat exchanger — common in London’s hard water.
F.22
Each code maps to a specific fault — see the code lookup below.
-2°C
Frozen condensate pipe — the number-one cause of winter breakdowns.
External pipe freezes in cold snaps and shuts the boiler down.
RAD
Frozen condensate pipe — the number-one cause of winter breakdowns.
External pipe freezes in cold snaps and shuts the boiler down.
You can try repressurising to 1.5 bar via the filling loop. If it drops again within days, there's a leak — book an engineer.
Check other gas appliances work. If they do, the fault is internal (electrodes, gas valve, PCB) — needs a Gas Safe engineer.
A restart may clear it once, but a recurring F75 means the pump or sensor is failing. Book before it becomes a full breakdown.
Often gas supply or flue related. Do not keep resetting — book an engineer.
Worcester Bosch
Try one reset. If EA returns, the boiler is locked out for safety — Gas Safe engineer required.
Worcester Bosch
Usually a pump, blockage or heat exchanger issue. Switch off and book — repeated overheating damages the boiler.
Baxi
Repressurise to 1–1.5 bar. Recurring E119 = leak somewhere in the system. We trace it rather than topping up forever.
Baxi
Check your gas meter/prepay credit and other appliances first. Still showing? Engineer needed.
Ideal
Repressurise via the filling loop to ~1.5 bar. If it keeps dropping, book a leak trace.
The boiler lit, then lost the flame. Gas supply, condensate or sensor fault — Gas Safe engineer required.
Often follows a frozen condensate pipe in winter. If pipes aren't frozen, the fault is internal — book a visit.
Glow-worm
One reset maximum. Recurring F.4 needs electrode/PCB investigation by an engineer.
Different code or different brand? Call 020 3000 0000 and read it to us — we’ll tell you over the phone what it means, free.
No hidden fees, no runaround. Over 85% of London repairs closed on the first visit.
Speak to a real person 24/7. We confirm an arrival window before you hang up.
The nearest Gas Safe engineer is routed to your door — typically 60–90 minutes.
Fault identified and explained. Fixed price agreed before any work begins.
Genuine parts, full safety test, 12-month workmanship guarantee.
Alpha
Ferroli
Job
Notes
Waived when you proceed
Manufacturer part
Full inspection
Chemical + magnetic
No call-out fee · No hidden extras · Fixed quote before work
Thirty seconds of honesty before you spend anything.
Croydon, Bromley, Sutton, Wandsworth, Lambeth, Lewisham
SE1
SE22
SW16
CR0
BR1
Hackney, Tower Hamlets, Newham, Waltham Forest
E8
Hammersmith, Kensington, Ealing, Hounslow, Hillingdon
W14
UB1
Westminster, the City, Southwark
EC2
SW1
“Called at 11pm on a Sunday — engineer at the door by 12:30. Diagnosed a failed diverter valve, fixed by 2am. Genuinely lifesaved us before a newborn came home.”
N1 · Islington
“Fixed price given on the phone, no upsell, no drama. Boiler back on within 90 minutes. Best trades experience I’ve had in London.”
N1 · Islington
N1 · Islington
Every engineer in our network carries a Gas Safe ID card with their photo, licence number and the work they’re qualified for. Check it at the door — they’ll expect you to.
You can verify any engineer independently in 30 seconds at gassaferegister.co.uk. No ID, no entry: that’s the rule we tell our own customers to follow.
Gas Safe ID carried
DBS-checked
Uniformed & insured
We handle Landlord Gas Safety Records (CP12) for portfolios of every size across London — flats, HMOs, and blocks. Tenants notified, records digital, always compliant.
Property
Location
Appliance
Reg. No. XXXXXX
No. We do not charge to attend. You only pay for the diagnostic (£0–£75, waived when you proceed) and the agreed fixed-price repair.
Yes. After diagnosis we give a fixed written quote before any work begins. No hourly surprises.
