Air conditioning servicing
and maintenance in London
Air conditioning servicing in London, any make, that keeps the warranty valid, the air fresh and the system running efficiently.
Rated 5.0 on Google- Domestic annual service from 95 pounds plus VAT
- Any make, any age, including other installers' work
- Written record of every reading, for your warranty
Prefer to talk? 020 3393 1331
Accredited, and fitting the brands you know
What a service costs
Fixed prices for any make and any age, including systems we did not install. Every figure is plus VAT.
-
Annual serviceOne domestic system, the full twelve checksKeeps the warranty valid£95plus VAT
-
Each extra unitOn the same visit, no second call-out£55plus VAT
-
Deep cleanA heavily soiled indoor unit, blower wheel out£160plus VAT
-
Annual contractTwo visits, priority response, no call-out fee on faultsfrom£220plus VAT
Your estimate
£95to£95
Per visit, plus VAT. 95 pounds is 114 pounds including VAT.
Send this on WhatsAppPrice your own service
One visit, any make, any age. Each extra indoor unit on the same visit is cheaper than a second visit.
Last step: what number should we call with your fixed price?
Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.
Why people book their service with us
What goes wrong with a cheap service, and what we do instead.
Rated 5.0 on Google-
A record of every reading
Written down and left with you, which is what a manufacturer asks for if you ever make a warranty claim.
-
Any make, any installer
Including systems fitted by companies no longer trading. If there was no commissioning record, we start one.
-
Honest, in writing
If we can see something unsafe or badly installed, we tell you what is wrong in writing before signing anything off.
-
No second call-out
Every extra unit on the same visit is £55 plus VAT, so a house with three units is not paying for three visits.
Air conditioning we have installed
Our own jobs, each with its own page and the photographs from the day.
Air conditioning
BR3
Beckenham
Daikin multi-split, four rooms from one outdoor unit
One outdoor unit on the rear patio serving four indoor units, with the pipework taken up the back wall in trunking beside the downpipe and pressure tested with nitrogen at 40 bar for two hours before it was charged.
Read the case study
Air conditioning
CR2
South Croydon
LG wall-mounted air conditioning, fitted during a renovation
A large open-plan room in a house being renovated: the lines brought down from the ceiling first, the brackets fixed over them, and the LG units lifted on high on the wall.
Read the case study
Air conditioning
N11
New Southgate
Daikin multi-split condenser
Wall-mounted on brackets rather than stood on the ground, which is usually what a narrow side return leaves you, and the refrigerant lines dropped in a single trunked run.
Read the case study
Air conditioning
EN4
East Barnet
Air conditioning pipework in a new nursery, first fix
A nursery still being built: the refrigerant pipework and control cables run through the ceiling void above the corridor and down a riser between floors, tied in and sealed, before the ceilings and walls are closed.
Read the case study
A service in three steps
-
Pick a date
Before the first hot week is best, when the diary is quiet.
-
Two hours on site
Twelve checks, in the order that matters, with the system running.
-
A written record
What we found and what we did, which is what a warranty claim needs.
The full guide: the service item by item, F-Gas and what it costs
Air conditioning should be serviced once a year, and a domestic service in London costs 95 to 140 pounds plus VAT for one system.
Almost every manufacturer warranty is conditional on documented annual servicing, so the service is usually cheaper than the warranty it protects. Book it in April or May, before the first hot week fills every diary in London.
What happens in the two hours we are there
A service is not a look and a wipe. These are the twelve things we do, and the order matters because half of them only make sense once the system is running.
| Step | What it prevents |
|---|---|
| Filters cleaned or replaced | Lost airflow, higher bills, coil freezing |
| Indoor coil deep cleaned | The smell, and a 20 percent capacity loss |
| Blower wheel cleaned | Noise, poor throw, dust blown into the room |
| Condensate tray and drain flushed | Water dripping down your wall |
| Outdoor coil washed | High head pressure and a shortened compressor life |
| Electrical connections checked | Burnt terminals, the most common fire risk |
| Operating pressures measured | Finding a leak while it is still small |
| Temperature split measured | Proving the system actually performs |
| Refrigerant charge verified | Running low, which destroys compressors |
| Fan motor and bearings checked | The noise that starts in year four |
| Controls and all modes tested | Faults you would only find in December |
| Written record issued | A warranty claim that gets accepted |
What it costs
| Service | Price | Included |
|---|---|---|
| Domestic annual service, one system | £95 plus VAT | Full 12 point service and written record |
| Each additional unit, same visit | £55 plus VAT | Same service, no second call-out |
| Deep clean, heavily soiled indoor unit | £160 plus VAT | Chemical coil clean, blower wheel removed |
| Commercial system, per unit | £110 plus VAT | Plus F-Gas leak check and log where required |
| Annual contract, 2 visits | From £220 plus VAT | Priority response and no call-out fee on faults |
Why the smell happens, and why deodoriser makes it worse
The indoor coil is cold, wet and dark for four months of the year. That is an ideal surface for biological growth, and once it establishes, the smell arrives about thirty seconds after the unit starts, then fades. That timing is the giveaway.
A spray can pushes scent through the coil and leaves a residue that the growth then feeds on, so the smell returns worse. The fix is mechanical: pull the covers, clean the coil properly with the right chemistry, remove and wash the blower wheel, and flush the drain so the tray is not sitting in standing water for the rest of the year.
F-Gas: what actually applies to you
UK F-Gas rules set leak-check duties by system size, measured in tonnes of CO2 equivalent rather than in kilograms, so the same weight of two different refrigerants gives different answers.
| System size | Leak check | Typical example |
|---|---|---|
| Under 5 tonnes CO2e | No legal duty | Nearly all domestic single splits |
| 5 to 50 tonnes CO2e | Every 12 months | Larger multi-split, small commercial |
| 50 to 500 tonnes CO2e | Every 6 months | Office VRF systems |
| Over 500 tonnes CO2e | Every 3 months, plus leak detection | Large commercial plant |
The duty sits with the operator of the equipment, which for a leased office is normally the tenant rather than the landlord. Records must be kept for at least five years. If a system is below the threshold the check is still worth doing, because a slow leak costs you efficiency long before it causes a breakdown.
Servicing questions
How much does an air conditioning service cost in London?
95 pounds plus VAT for a domestic system, with each additional unit on the same visit 55 pounds plus VAT. A heavily soiled indoor unit that needs a deep clean is 160 pounds plus VAT, and a commercial system is 110 pounds plus VAT per unit.
An annual contract with two visits is from 220 pounds plus VAT, with priority response and no call-out fee on faults. Every price covers any make, whoever installed it.
How often should air conditioning be serviced?
Once a year for a domestic system, and every six months for a commercial one that runs all day. Almost every manufacturer warranty requires documented annual servicing, and a warranty claim on an unserviced system is normally refused.
The best month is April or May, before the first hot week. Everyone calls in the third week of June and nobody can get a slot.
What does an air conditioning service actually include?
Filter clean or replace, indoor coil and blower wheel clean, condensate tray and drain flush, outdoor coil wash, electrical connections checked and tightened, operating pressures and temperature split measured, refrigerant charge verified, and controls and modes tested.
You get a written record of the readings, which is what a manufacturer asks for if you ever make a warranty claim.
Do I legally need an F-Gas leak check?
Only above a size threshold. Systems containing 5 tonnes of CO2 equivalent or more must be leak checked at least every twelve months by a certified person, and records kept. Almost every domestic single split sits below that threshold, so the check is good practice rather than a legal duty.
Most commercial multi-split and VRF systems are above it, and the duty falls on the operator of the equipment, which usually means the business occupying the building rather than the landlord.
My air conditioning smells. What is that?
Almost always biological growth on the indoor coil and in the condensate tray, where a dark, wet, warm surface has been left to itself for a couple of years. It is the single most common reason people call us about a system that is otherwise working.
A proper coil clean and drain flush fixes it. A spray can of deodoriser masks it for a fortnight and makes it worse, because the residue feeds the growth.
There is a full page on it: why air conditioning smells and what a clean costs.
Will you service a system another company installed?
Yes, any make and any age. We do a lot of it. What we will not do is sign off a system we can see is unsafe or badly installed without telling you what is wrong with it in writing first.
If the original installer left no commissioning record, we start one, which puts your warranty position back on a documented footing.
Book a service before the first hot week
One visit a year keeps the warranty valid, the bills down and the smell away. Any make, any age, including systems another company installed.
Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed
Page updated