Windsor and Maidenhead · Air conditioning repair
Air conditioning repair in Cold Harbour, Windsor and Maidenhead
Air conditioning repair in and around Cold Harbour, from a site survey or diagnosis to sign-off with the price fixed before work begins.
- Drips from the indoor unit
- Ice forming on the indoor unit or pipes
- A system that runs but doesn’t cool the room
Air conditioning repair for homes and businesses in Cold Harbour
A sealed system shouldn’t lose refrigerant, so a low charge means a leak somewhere. Topping up without a repair only delays the next breakdown. We locate the leak, repair it, test, evacuate and recharge and write it up in the F-Gas records. If the problem is rattling, buzzing or grinding noises and ice on the pipework or the coil, we can help.
Around Cold Harbour, repairs tend to be home systems, garden rooms and a few businesses. A photo of the unit’s label and a description of the fault help us plan.
We’re an F-Gas certified company, NICEIC approved for electrical work, with MCS certification for heat pumps and Checkatrade membership. Our engineers hold the F-gas qualifications needed to work on refrigerant.
- Where
- Cold Harbour (SL6)
- Region
- Windsor and Maidenhead
- Approvals
- NICEIC approved, F-Gas certified
- Costs
- Diagnosis from £75 + VAT
- Pricing
- Fixed, in writing
- Replies
- We reply the same working day
- Telephone
- 07833 053749
- Last updated
- 30 October 2026
How it works
Testing is the last part of the visit wherever the system can be switched on. Then we explain what was done and answer your questions, and anything that needs attention later is pointed out. The visit takes an hour or two to diagnose most faults, with the repair time depending on what we find. Pictures of the space and where the outdoor unit could go let us plan the work in Cold Harbour.
- It starts with the symptoms: what the unit is doing, the make and any code on the display.
- The engineer reads the fault codes and checks the electrics, airflow, drain and refrigerant circuit.
- Once the cause is found, we explain it and fix the price for the repair.
- With your agreement the part is replaced or the fault put right, and refrigerant work goes in the F-Gas log.
- We run the system, check it’s working properly and note anything else that needs attention.
Preparing for the visit
- Give us access to the outside wall, roof or yard where the outdoor unit sits
- Arrange for someone to be there to let us in
- Clear access to the fuse board
Getting a quote
VAT is set out clearly on every quote, with the rate that applies to your job. VAT can differ between homes and businesses and between kinds of work, so we confirm it on the quote. For a fixed-price quote, ring 07833 053749 or fill in the contact form.
Advice
Landlords, agents and facilities managers
Managing agents often deal with us directly. Tell us the property, the work and the access arrangements, and we’ll send a fixed-price quote.
Larger air conditioning systems in buildings need more than servicing: systems with an effective rated output over 12 kW need a TM44 inspection by an accredited energy assessor at least every 5 years. We can arrange it, prepare the system for it and fix what it finds.
Your questions about air conditioning repair in Cold Harbour
Can you do air conditioning repair in Cold Harbour?
We do: Cold Harbour falls inside our working area. Get in touch with the details and we reply the same working day.
Who do I call if my air conditioning fails in Cold Harbour out of hours?
Yes. Our 24/7 emergency line covers Cold Harbour. Have the make, model and error code ready, and we will talk you through what happens next.
Can I fit air conditioning or a heat pump 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 are happy to quote for the full job, supply to commissioning.
Why is my air conditioning icing up?
When airflow drops or refrigerant is lost, the coil gets cold enough to ice. A dirty filter is worth checking first and if that is not it, we’ll find the cause.
Do you work on commercial properties?
Yes. Homeowners, landlords, agents and businesses all book us in Cold Harbour and across Windsor and Maidenhead. Tell us who should receive the paperwork.
Can you set up regular servicing?
Yes. We offer maintenance contracts, set at the interval the system and the manufacturer’s terms need. Each visit is written up, with F-Gas records where refrigerant work is involved.
Is there a survey before the work?
Yes. For simple jobs, photos and a few details can be enough, while bigger systems and repairs that need testing get a visit.
What we are called out for in Cold Harbour
Some faults stop the unit completely: fan motors, boards, interconnecting cables and tripped breakers. A breaker that trips a second time should be left off until an engineer has looked at it.
Customers typically contact us after spotting something like this:
- Rattling, buzzing or grinding noises
- Water dripping from the indoor unit
- A system that keeps cutting out
The make, model and error code are the most useful things to tell us.
What to look for in a quote
- Why the equipment they’re quoting suits the job
- Whether a new circuit is included and who certifies it
- Whose warranty applies, and on what terms
Air conditioning repair in Cold Harbour: the local picture
The middle of Cold Harbour is part of a conservation area. About 4 listed entries lie within half a mile of central Cold Harbour, Folly Cottage (grade II) among them. Day-to-day work on an existing system isn’t affected; a replacement outdoor unit on a protected building might be. About 47% of homes in the Cold Harbour area date from 1945 to 1972, according to VOA council tax data, and about 70% of households live in detached or semi-detached houses, according to the last census (2021). If the outdoor unit is high up or behind a locked gate, mention it when you book.
Schools such as Knowl Hill Church of England Primary Academy can report a fault on the 24/7 line and have non-urgent work done out of term.
Cold Harbour is about 3 miles west of Maidenhead, in Windsor and Maidenhead. Wherever you are in the SL6 postcode area, we cover air conditioning repair. Cold Harbour is one of 57 places in Windsor and Maidenhead we cover. There’s also a page for Guildford, roughly 20 miles from Cold Harbour.
The closest recent job we can point to from Cold Harbour was on Princess Way, Camberley (GU15), about 12 miles south: installing a Samsung VRF system serving twelve rooms across two floors, including open-plan working areas, individual offices, a server room and a boardroom.
Our working area takes in SL6, every street of it. Places around Cold Harbour that are also on our list: Knowl Hill (1 mile north-west), Warren Row (1 mile north-west), Bowsey Hill (2 miles west), Cockpole Green (3 miles north-west) and Wargrave (3 miles west). Further out, we also cover Maidenhead (3 miles east), Windsor (8 miles east), Boyn Hill (3 miles east) and North Ascot (8 miles south-east).
Landmarks near Cold Harbour
We fit and service air conditioning in homes and premises around Cox Green School and The Royal Oak pub. The nearest railway station is Wargrave station, roughly 3.3 miles west. Nearby you’ll also find St Mark's Hospital (2.8 miles north-east). Not far away are Hurley Chalk Pit and Taplow Lake.
System by system
Circuit boards and sensors
Boards and sensors are the system’s nervous system. Sensor faults can stop the system or confuse it, and boards can fail after a power surge or with age.
Wall-mounted split systems
The indoor and outdoor units of a split communicate through a cable. A break in that communication usually brings up an error code and testing finds whether it’s the cable, a board or a connection.
Also near Cold Harbour
More services for Cold Harbour
From one of our customers
“Very professional from the initial survey through to installation. The engineer explained everything clearly and the quote was exactly what we paid. Would not hesitate to recommend AirCon Doctor.”
David W., Haywards Heath