Heating Services in London Available 24/7

No hot water on a Monday morning? Boiler making noises it shouldn't? Our heating services in London work around the clock, with a two-hour emergency response when the system fails. Boiler repairs, full installs, central heating, air conditioning, and ventilation, all handled by qualified engineers for homes, businesses, and maintenance partners.

25+ years of experience

2-hour emergency response

 Call 0800 689 3497

Trusted by leading UK brands and property managers

Heating and AC services built for fast response

FS Group provides heating services in London for residential properties, commercial sites, and the maintenance teams running them. 

Our engineers handle boiler breakdowns, installations, central heating, AC repair, air conditioning service, and ventilation work across London and the South East. 

Every job is signed off by a qualified Gas Safe or F-Gas certified engineer with the right kit and the right paperwork. Quick diagnosis, fair quotes, and a system that works properly when we leave. No agency cover, no shortcuts. 
fs group drainage services

Our heating & AC services

Available across London and the South East 24/7.

Common heating and AC problems we get called for

Heating and air conditioning rarely fail at convenient times. Whatever's gone wrong at yours, our engineers have seen it plenty of times before.
No heating or hot water
plumbing services london
A cold property usually points to a boiler fault, a failed thermostat, or a pump problem. We diagnose the cause, fix what's failed, and get the system back up the same day where possible. Gas Safe registered, with the parts to finish most jobs on the first visit.
Boilers making strange noises
plumbing services london
Banging, kettling, or gurgling sounds from a boiler usually mean limescale build-up, trapped air, or a failing component. We inspect the system, flush or repair what's needed, and stop the problem getting worse before it kills the boiler completely.
Low boiler pressure 
plumbing services london
A boiler that loses pressure repeatedly is leaking somewhere, even if you can't see water. We track the leak down (often a radiator valve, a pipe joint, or the boiler itself), fix the source, and re-pressurise the system properly so it stays stable.

Learn more.
Cold radiators or uneven heating
OUTDOOR PLUMBING
Radiators that stay cold at the bottom, the top, or only in certain rooms point to sludge build-up, trapped air, or a circulation issue. We bleed the system, power flush if needed, and balance the radiators so the heating works evenly across the property.
AC units not cooling properly
TAP REPAIR & INSTALL
An air conditioner that's running but not cooling usually means low refrigerant, a dirty filter, or a failing compressor. Our F-Gas certified engineers diagnose the cause, fix the underlying issue, and get the system pulling temperature again instead of just blowing warm air.
AC leaking water or making noise 
TAP REPAIR & INSTALL
A leaking or noisy AC unit usually points to a blocked drain line, a frozen coil, or a worn-out fan motor. We isolate the unit, clear the blockage or replace the failed part, and check the rest of the system for anything else about to go.
Old or unsafe consumer units
TAP REPAIR & INSTALL
Older fuse boards without RCD protection are a real safety risk and won't meet current regulations. We assess the existing unit, recommend the right replacement, and fit a new consumer unit that's compliant, safer, and easier to work with going forward.
plumbing services londonFS Group drainage servicesplumbing services londonOUTDOOR PLUMBINGTAP REPAIR & INSTALLAPPLIANCE INSTALLATIONDRAIN JETTINGDrain ReliningEMERGENCY DRAIN SERVICES

Trusted across London and the South East

Professional heating engineers on call right now

Every engineer who turns up at your door is fully trained, fully kitted, and ready to fix the problem on the first visit. No subcontractors, no learners, no guesswork. Call us 24/7 and we'll be at your property within two hours for emergencies.
fs group drainage services

Why choose FS Group?

We've spent over 25 years building a property maintenance operation that runs on speed, clear communication, and fair pricing. Transparent rates, free quotes, and no hidden fees. 
Two-hour emergency response
We're on call 24/7 across London and the South East, with engineers dispatched and on-site within two hours for emergency call-outs.
25+ years of experience
We've handled maintenance work for homes, businesses, councils, and national brands since the late 90s. The team knows the job, the kit, and the shortcuts that don't cause problems later.
Free quotes over the phone
Every job gets a clear breakdown of cost and timing before we start. Most quotes are non-chargeable, and you'll never get a surprise on the invoice.
Trusted by major brands
KFC, Westfield, Peabody, Notting Hill Genesis, Tower Hamlets Council, and Sir Robert McAlpine all rely on FS Group for maintenance work, all thanks to our true worksmanship. 

Heating and AC services for commercial clients and maintenance partners

When the power goes down on a managed site, every minute costs money. FS Group handles electrical services in London for retail estates, housing portfolios, hotels, councils, and facilities management companies.

Our engineers are ready to mobilise the same day. EICR programmes, PAT testing schedules, compliance documentation, and job reporting are all handled internally, so your team doesn't end up chasing certificates. 
fs group drainage services

How it works

From the moment you call to the moment we leave, here's exactly what to expect. 
Schedule a job
Call us or book online 24/7, every day of the year. Tell us the problem, we'll line up the right engineer.
Booking confirmed
We'll confirm your appointment within minutes and dispatch an FS engineer fast. You'll know who's coming and when.
Track your engineer
Watch your engineer travel to you in real time. No vague "between 9 and 5" windows. You see exactly where they are.
Problem solved
Your engineer arrives fully kitted, diagnoses the issue on-site, and fixes it on the first visit wherever possible.

Heating or AC trouble in London? We'll handle it

A team of Gas Safe and F-Gas certified engineers, ready to roll 24/7 with a two-hour emergency response, fixed quotes over the phone, and zero hidden costs. Book your heating services in London with FS Group and get it sorted today.

Frequently asked questions

How much does a boiler repair cost in London? 
Most boiler repairs in London cost between £150 and £450, depending on the fault and parts needed. Simple thermostat or pressure issues sit at the lower end, full component replacements at the higher end. We quote over the phone wherever possible, with no surprise charges on the invoice.
How quickly can you get a heating engineer out to me? 
For emergencies like no heating, no hot water, or a leaking boiler, we aim to have a Gas Safe engineer on-site within two hours. Our team operates 24/7 across London, Essex, Kent, and Hertfordshire. For planned work, we'll book you in at a time that suits you.
Are your heating engineers Gas Safe registered?
Yes. Every engineer working on gas appliances, boilers, central heating, and gas-fired systems is Gas Safe registered. It's a legal requirement, and we won't send anyone unqualified to a gas job. Our AC engineers are also F-Gas certified for refrigerant work.
How often should a boiler be serviced? 
Annually. Manufacturers require a yearly service to keep warranties valid, and landlords legally need a Gas Safety Certificate every 12 months. Regular servicing also catches small faults before they become breakdowns, which usually works out cheaper than emergency call-outs.
Do you handle both heating and air conditioning maintenance in London? 
Yes. We service boilers, central heating, AC units, ventilation systems, and combined HVAC setups under one team. Air conditioning maintenance in London is handled by F-Gas certified engineers, with scheduled programmes available for commercial sites and Priority Account holders.
What should I do if my boiler is leaking? 
Turn off the boiler at the main switch, close the water supply valve to the unit, and place a container under the leak to catch the water. Then call us. A leaking boiler can damage flooring, drop system pressure, and become dangerous if it's a gas leak too.
Can you install a new boiler the same day?
For straightforward like-for-like swaps, yes, often the same or next day. Full system upgrades, fuel changes, or new installs need a survey first to get the spec right. We give an honest timeline and fixed quote before any work starts.
Do you do AC installation for offices and commercial properties? 
Yes. Our F-Gas certified engineers install split systems, multi-split setups, and full commercial AC installations across offices, retail units, server rooms, and hospitality sites. We handle the survey, install, commissioning, and ongoing servicing under one team.
Do you handle heating services in London for property managers? 
Yes. We work with property managers, housing associations, retail chains, councils, and facilities management teams across London and the South East. Priority Account holders get same-day response, scheduled servicing programmes, and full compliance documentation handled in-house.
What areas do you cover for emergency heating call-outs? 
We cover all of London, including every borough, plus Essex, Kent, and Hertfordshire. That includes North, South, East, and West London, the City, and surrounding commuter towns. Two-hour emergency response applies across the full coverage area, 24/7.