Greater London · Air conditioning repair
Air conditioning repair in Charlton, Greater London
Air conditioning repair for Charlton and the surrounding area: a survey or diagnosis, a fixed price, careful work and proper paperwork. Call for a fixed-price quote.
- A flashing light and a system that will not run
- Air conditioning running but not cooling
- A suspected refrigerant leak
How we handle air conditioning repair in Charlton
Think of it as a doctor’s appointment for your air conditioning: diagnose the cause, treat it properly and sign it off when it’s working. Guessing is expensive, and topping up refrigerant on a system with a blocked filter fixes nothing. The work covers heat pumps, ceiling cassettes and VRF systems, and common reasons people get in touch are a system that runs but doesn’t cool the room and a system that needs topping up again.
In a managed building in Charlton, the repair may need booking through the agent or building manager, so let us know who needs to know we’re coming. Outdoor units on roofs may need a key, a permit or an escort, and we plan for that before we arrive.
AirCon Doctor is an F-Gas certified company and NICEIC approved for electrical work, MCS certified for heat pumps and a Checkatrade member. Our engineers hold the F-gas qualifications needed to work on refrigerant.
- Where
- Charlton (SE7, SE18)
- Wider area
- Greater London
- Quotes
- A fixed-price quote up front
- Approvals
- NICEIC and F-Gas
- Prices
- From £75 + VAT call-out
- Telephone
- 07833 053749
- Updated
- 30 October 2026
How the job changes from property to property
Circuit boards and sensors
Circuit boards and temperature sensors control how the system runs. Sensor faults can stop the system or confuse it, and boards can fail after a power surge or with age.
Condensate drains and pumps
Most water leaks from indoor units come back to the condensate system. Blockages, kinks and failed pumps are the usual causes, and a unit that is not level can spill water too.
How the visit works
Our engineers arrive at the time agreed with you and check the plan with you first. Floors and furniture near the work are covered with dust sheets, and anything electrical is made safe before work starts. On site, it takes as long as the fault needs, from a quick fix to a return visit for parts. Send us a few phone pictures and we can often price a straightforward job in Charlton before visiting.
- First the diagnosis: fault codes read, electrics and airflow checked, drain and refrigerant tested.
- Next, a plain explanation and a fixed price.
- Where a repair doesn’t make sense, you will hear it from us, with the alternatives.
- The treatment: the repair itself, with any leak found and fixed before recharging.
- The sign-off: the system tested in operation and the work recorded.
Preparing for the visit
- Keep pets out of the rooms we are working in
- Let us know where the consumer unit is
- Clear a path to the units and the space around them
Getting a quote
Quoting starts with a diagnosis, from a site survey or, where the job is straightforward, from pictures and measurements. After that, we send a fixed price before any work starts.
Related advice
Common problems we fix in Charlton
An error code is the unit’s own diagnosis, in shorthand. Each manufacturer uses its own codes, and the same code can have more than one cause so the code is a starting point, not the answer. Sensors, communication faults between the units and circuit boards are frequent culprits.
These are the situations we see most often:
- A system that needs topping up again
- New noises from the system
- Frost on the pipework
Shops and offices around Charlton station often cannot wait for cooling to come back, which is what the 24/7 line is for.
What your quote should include
- Exactly what the price includes, from supply and fitting to commissioning
- Which VAT rate the quote uses, and why
- Whether they hold F-Gas company certification, not just individual qualifications
Charlton: your questions answered
Who do I call if my air conditioning fails in Charlton out of hours?
Yes. Our 24/7 emergency line covers Charlton. Say what the system is doing and whether it shows a code, and we will advise on the next step.
What’s the best way to get a price for air conditioning repair in Charlton?
Use the quote form, or email, with a description of the job. We reply the same working day, and the quote is fixed before any work starts.
Can I do the refrigerant work myself?
The refrigerant side has to be done by a qualified engineer working for an F-Gas certified company. That’s the law, not just our preference, and it also matters for the manufacturer’s warranty. We’re happy to quote for the full job, supply to commissioning.
How long will you be on site?
It depends on the job, but in most cases it takes a single visit for many faults, while some repairs need a second visit once parts arrive. We will confirm it with the quote.
What does F-Gas certified mean?
Companies working on equipment that contains F gas must be certified by an approved body, and each engineer needs the right qualifications too. It’s how you know the refrigerant is being handled legally and safely.
Can landlords and managing agents book you?
Yes. We work for homeowners, landlords, letting and managing agents, and businesses of every size in Charlton and across Greater London. Tell us who should receive the paperwork.
Do I get paperwork after the visit?
Yes. It’s your proof of what was done: the date, the work, and any refrigerant added or recovered.
Aftercare tips
Looking after it is simple, and it helps at the next service:
- Write down the fault code if there is one
- Book an annual service after the repair
- Stop the unit if water is coming through a ceiling
If parts are needed, we tell you what’s on order and book the return visit with you. We don’t promise dates we can’t control and we will keep you updated.
Clean the filters regularly. Clogged filters starve the unit of air, and that can cause ice, drips and poor performance and the manual shows how to clean them.
Nearby places to Charlton
What else we do in Charlton
What a repair looks like in Charlton
The last census (2021) found about 53% of households live in flats. Balcony, roof or high wall? Knowing where a flat’s outdoor unit is helps us bring the right access kit. London repairs often depend on reaching the outdoor unit, so access details help us plan. The middle of Charlton is part of a conservation area. Listed buildings are part of the picture here: about 16 within half a mile of the centre, such as Charlton House (grade I). That only matters for replacements, where a new outdoor unit on a protected building can need consent.
Schools such as Thorntree Primary School can report a fault on the 24/7 line and have non-urgent work done out of term.
Charlton is about 2 miles west of Plumstead, in Greater London. Our engineers cover Charlton for air conditioning repair and across the rest of Greater London. Count every place we list in Greater London and you reach 764, with Charlton on the list. London is in our area too, around 6 miles away.
The closest recent job we can point to from Charlton was on Greenwich High Road, Greenwich (SE10), about 2 miles west: installing a Mitsubishi Electric wall-mounted unit in the retail area and a second unit in the stockroom and office.
If your postcode is in SE7 and SE18, you are inside the area we cover. Floyd Road, Guild Road and Priolo Road and the roads off them are all inside our area. Close by, we work in New Charlton (1 mile north-west), Westcombe Park (1 mile west), Woolwich (1 mile east), Vanbrugh Park Estate (1 mile south-west) and Kidbrooke (2 miles south). Further out, we also cover London (6 miles west), City of Westminster (8 miles west), Marylebone (8 miles west) and Kensington (10 miles west).
Landmarks near Charlton
Typical jobs here are in properties near Charlton Park, Wildwood Montessori School and Royal Greenwich Trust School. There’s a railway station in Charlton itself: Charlton station. Well-known places in the area include British Hospital for Mothers and Babies (0.5 miles east) and Gallions Reach Shopping Park (2.3 miles north-east). Open spaces near Charlton include Gilbert's Pit.
What a customer said
“Excellent service from start to finish. Two wall-mounted units installed in our home. Clean, tidy work: they protected all the floors and left no mess. The systems work brilliantly. Would highly recommend.”
Sarah M., East Grinstead