5 Best Air Conditioner Repair in London (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Brad Smith, Home Services Expert · ✓ Data verified July 2026 · 8 min read

The flat's stuck at 28 degrees again and the fan's just pushing hot air around the room. The firms doing air conditioner repair in London on this page carry 377 Google reviews between them, and every single one rates 4.7 or higher, so the real decision isn't who's good, it's who can actually get an engineer out today.

Short answer: Be Cool Refrigeration & Air-conditioning leads with a 4.8 rating across 170 reviews and 24/7 emergency cover from F-Gas certified engineers. iClimate (4.8, 72 reviews) and Giovanni the Plumber (5.0, 52 reviews) round out the top three. Ask every company to confirm F-Gas certification before booking, it's the industry credential for handling refrigerant gases legally.

Jump to a business

1. Be Cool Refrigeration…
2. iClimate
3. Giovanni the Plumber
4. Thermacool Services
5. London Air Con
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How London's AC Repair Specialists Stack Up

#	Business	Rating	Reviews	Best for
1	Be Cool Refrigeration & Air-conditioning	4.8 ★	170	Commercial jobs & 24/7 emergencies	View ›
2	iClimate	4.8 ★	72	Period and listed properties	View ›
3	Giovanni the Plumber	5.0 ★	52	Plumbing, heating and gas work (confirm AC scope directly)	View ›
4	Thermacool Services	4.7 ★	49	Whole-home multi-unit installs	View ›
5	London Air Con	5.0 ★	34	Discreet single-room installs	View ›

5 Best Air Conditioner Repair in London (2026)

Our shortlist, reviewed one by one

#1 Overall🕑 Open 7 days↩ Responds to reviews

Be Cool Refrigeration & Air-conditioning

4.8170 Google reviews

Be Cool Refrigeration and Air-conditioning has been fitting and servicing AC and commercial refrigeration systems across London since 2004. The team of F-Gas certified engineers covers everything from single split installs to full commercial cold rooms and walk-in freezers, and the company says it has completed more than 2,000 projects citywide. Alongside repairs, it runs planned maintenance contracts and 24/7 emergency callouts for businesses that can't afford downtime.

What people praise

Engineers explain the job clearly before starting, down to why a certain unit position was chosen
Multi-unit installs finished faster than customers expected, including a three-day quote done in one
Neat, discreet pipework and cable routing praised across several separate jobs
Free upfront visits to assess the space before quoting

Reputation scorecardrank in London

Rating4.8 / 5

Review volume170 · 97th

Confidencemoderate

Recency6 weeks ago

Info completenesssite · phone · hours

Rating breakdown93% 5-star

✓ VerifiedSource: Google

Our take: The volume of five-star reviews here is unusual even by London AC standards, and the mix of residential and commercial work suggests a team that can handle bigger jobs without losing the small-job responsiveness. It's our top pick on the numbers, full stop.

Website +442034881889 Directions

35-37 Ludgate Hill, London EC4M 7JN

#2🕑 Open 7 days↩ Responds to reviews

iClimate

4.872 Google reviews

iClimate is a second-generation family HVAC business that specialises in fitting air conditioning into buildings that don't make it easy, from Grade II listed Georgian townhouses to converted barns. The team, led by engineer Adam, covers everything from single split systems through to whole-house installs and also handles refrigeration work. They say they've been doing this for more than 25 years across the UK.

What people praise

Handles tricky older properties where wiring and pipework have to stay hidden
Adam personally returns for aftercare years after the original install
Quiet units and a tidy finish praised across multiple Victorian and period-property jobs
Competitive pricing against larger installers, per more than one reviewer

Worth knowing

One customer reported an issue after the initial installation, though the team returned promptly and fixed it at no extra cost

Reputation scorecardrank in London

Rating4.8 / 5

Review volume72 · 90th

Confidenceearly

Recency7 months ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: Where iClimate stands out is period properties, the kind of job where a standard installer might struggle to hide the wiring. The rating matches Be Cool's, but with under half the review volume, so the sample is a bit thinner.

Website +442031981101 Directions

43 Berkeley Square, London W1J 5AP

#3🕑 Open 5 days/wk

Giovanni the Plumber

5.052 Google reviews

Giovanni the Plumber is a London plumbing and heating business built around hourly-rate call-outs for plumbing, gas, boilers and drainage. Giovanni describes himself on his own site as a young Italian plumber building a family business in London with his wife Greta, and the published rates cover boiler servicing, boiler installation, gas safety checks and powerflushing. Google lists the business under air conditioning repair, but neither the site nor the visible reviews describe AC-specific work; the track record here is squarely plumbing, heating and gas.

What people praise

Reviewers repeatedly describe him as knowledgeable, efficient and reliable across boiler, tap and drainage jobs
Multiple customers have used him for three or four years running for varied plumbing and heating needs
Clear published hourly rates, so pricing isn't a surprise
Recommended by a local plumbing store, according to one reviewer

Worth knowing

Published site content and customer reviews focus on plumbing, boilers and heating rather than air conditioning specifically, so it's worth confirming AC repair experience directly before booking

Reputation scorecardrank in London

Rating5 / 5

Review volume52 · 83th

Confidenceearly

Recencyabout a year ago

Info completenesssite · phone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: This one's a genuine surprise on an AC repair page. The rating is perfect, but everything we can verify about the business points to plumbing and heating rather than air conditioning. Call first and ask specifically about AC work before you book on the strength of this listing.

Website +447455223422 Directions

#4🕑 Open 7 days

Thermacool Services

4.749 Google reviews

Thermacool Services installs and maintains air conditioning for homes, restaurants, offices and small businesses across London. Reviews describe jobs ranging from single-room splits to whole-house systems covering three or four rooms, carried out by named engineer teams who coordinate around existing renovations rather than working against them.

What people praise

Creative solutions for awkward outdoor units, including one built into a bench seat on a balcony
Colour-matched finishes so indoor units blend into existing kitchens and walls
Multiple installs completed with zero damage to freshly renovated walls and ceilings, per two separate reviews
App-based climate control set up and explained clearly to customers

Worth knowing

The company's own site offers limited detail beyond contact information, so it's worth calling to confirm exact service coverage

Reputation scorecardrank in London

Rating4.7 / 5

Review volume49 · 77th

Confidenceearly

Recency12 months ago

Info completenesssite · phone · hours

Rating breakdown92% 5-star

✓ VerifiedSource: Google

Our take: Thermacool's strength is whole-home jobs where the finish matters as much as the cooling, several reviewers specifically praise how invisible the work looks once it's done. A solid mid-table pick on rating and volume both.

Website +442077388666 Directions

60 Buckingham Gate, London SW1E 6AJ

#5🕑 Open 7 days↩ Responds to reviews

London Air Con

5.034 Google reviews

London Air Con installs, maintains and repairs air conditioning systems across the city, and the business says it draws on more than 30 years of combined experience from its engineers. Recent reviews describe everything from a single split unit fitted into a loft to a full three-bedroom flat install, with the team known for site visits ahead of any quote.

What people praise

External units positioned to stay out of sight from the road or courtyard, per two separate customers
Two site visits before quoting, rather than relying on customer-supplied photos
Small, quiet indoor units that still cool a room quickly
A straightforward, fuss-free process described by more than one reviewer

Worth knowing

The smallest review count on this list, so the track record, while flawless so far, is still relatively new

Reputation scorecardrank in London

Rating5 / 5

Review volume34 · 70th

Confidenceearly

Recency4 weeks ago

Info completenesssite · phone · hours

Rating breakdown97% 5-star

✓ VerifiedSource: Google

Our take: A perfect rating and genuinely positive detail in every review, the catch is simply that there's less data here than the businesses above it. Worth a call if discretion around the outdoor unit is your main concern.

Website +448002086722 Directions

S201, Garden Studios, 71-75 Shelton St, London WC2H 9JQ

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Watch: 5 Best Air Conditioner Repair in London (2026)

How we scored these AC companies

Every score here comes from that business’s live Google listing: the star rating is the average of all customer reviews, and review volume tells you how many people actually left one. Confidence blends the two, so a 5.0 rating built on 30 reviews scores differently than a 4.8 built on 170. Recency checks how current the feedback is, because a great reputation from three years ago doesn’t guarantee today’s service. No business can pay to move these numbers.

What does AC repair cost in London? (2026)

Pricing depends heavily on the job: a simple regas or filter service costs far less than diagnosing a fault in a multi-split commercial system, and call-out charges vary between firms that quote a flat diagnostic fee and those that fold it into the repair cost. We couldn’t verify a trustworthy, current set of London-wide price ranges for this trade, so ask each company for a written quote before booking rather than relying on a headline figure.

AC repair and installation across London

These five cover a wide spread of the city, from Ludgate Hill and Mayfair in the centre to Wandsworth, Kingston upon Thames and the northern boroughs further out. If you’re searching for air conditioning repair near me anywhere in Greater London, most of these firms will travel; it’s just worth confirming the call-out radius and any travel charge before booking.

What to ask before you hire an AC repair company

Are your engineers F-Gas certified, and can you show the certificate?
Is the call-out or diagnostic fee separate from the repair cost, and does it apply if I decline the quote?
What’s your response time for emergency callouts, and is there an out-of-hours premium?
Do you offer a warranty on parts and labour, and for how long?
Can you work with my existing system’s brand, or will parts need to be sourced specially?
Will the outdoor unit position need planning permission or freeholder sign-off in my building?

Frequently asked questions

Are these rankings paid?

No. Rankings come from public Google data. A business can pay to be a Featured Partner (badge and top placement), but that never changes another business’s score or position.

How did you choose these AC repair companies?

We compared every air conditioning repair and installation business in London with a real Google track record, weighing star rating against review volume so a handful of five-star reviews can’t outrank a company with a genuinely large, happy customer base.

How often is this list updated?

We last verified ratings and review counts in July 2026. Businesses can change quickly, so always check a company’s live Google profile before booking.

Should I choose a specialist AC company or a general plumber or electrician?

A specialist AC or HVAC contractor is usually the safer choice for installs and complex repairs, since F-Gas certification is legally required for handling refrigerant. If a general tradesperson lists AC repair, confirm their specific certification first.

Is it cheaper to repair or replace an old AC unit?

It depends on the age and condition of the system. Most companies will diagnose the fault first and give you a repair quote alongside a replacement estimate, so you can compare rather than guess.

The bottom line

Be Cool Refrigeration and Air-conditioning is the safest default given its combination of scale and consistency, but iClimate is worth a call if you’re dealing with a period property that needs a more careful install. Whoever you pick, ask for F-Gas certification upfront, it’s the one credential that actually matters.

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