Home air con servicing · Hounslow & nearby TW postcodes
Air Conditioning Servicing in Hounslow
What does an air conditioning service actually include? A clean and performance check of your entire home split system. We cover the filters, coils, condensate drain, fans, refrigerant pressures and electrics. Hounslow Air Conditioning arranges home air con servicing across TW3, TW4 and TW5 through local F-Gas certified installers. They work on all major brands, and on single, multi-split and ducted systems. Whatever AC system you have, you can rest assured we can look after it!
- All major brands
- Written service record for your warranty
- Price confirmed before the visit
What's included in a home air con service
- Filters cleaned or replaced
- Indoor coil and fan cleaned
- Condensate drain and tray flushed
- Outdoor coil and fan checked and cleared
- Refrigerant pressures, temperatures and leak check
- Electrical connections and controls tested
- Written service record
What each service check finds before it becomes a repair
Each part of a service is there to catch a specific fault. Here's what the engineer checks, what they're looking for, and the breakdown it heads off.
| Service check | What the engineer looks for | Breakdown it prevents |
|---|---|---|
| Filters | Dust and fibre build-up restricting airflow | Weak cooling, iced coil, water leaks |
| Indoor coil and fan | Mould, dust matting and slime on the coil and fan barrel | Musty smells, reduced airflow, fan noise |
| Condensate drain and pump | Sludge in the tray, blocked or kinked drain pipe, pump running | Water dripping from the indoor unit |
| Outdoor coil and fan | Leaves, debris and damaged fins blocking heat rejection | High-pressure trips and outdoor fan faults |
| Refrigerant pressures and temperatures | Readings outside the manufacturer's range, oil marks at joints | Slow leaks turning into a compressor failure |
| Electrics and controls | Loose or scorched terminals, capacitor condition, sensor readings | Won't start, breaker trips, error codes |
Already broken down? Our guide to common air con faults, error codes and repair costs has quick checks you can try before an engineer comes out.
How often to service home air conditioning
As air conditioning pros, we recommend home air conditioning needs a professional service once every year. This ensures you are getting good value out of your investment, and stops expensive problems before they cost you money. In between these services, we recommend you rinse the filters every 2–4 weeks (if you're using the system regularly). They will clog faster if a unit is runs 24/7 or you have pets. Check out the table below for more details.
| How you use it | Professional service | Filter rinse |
|---|---|---|
| Cooling in summer only | Once a year, in spring | Every 2–4 weeks in summer |
| Heating and cooling all year | Once a year, in autumn | Every 2–4 weeks, all year |
| Bedroom unit running overnight, or pets in the home | Once a year, with the coil and fan checked for mould | Every 2 weeks |
The best time to book a service in Hounslow
The best time to book a service in Hounslow is usually between the Autumn and Spring. In the Summer (especially the high temperature summers we are having lately!) Engineers are busiest in heatwaves, because a lot of AC units are failing, and they all needs attention at once. Heathrow hit a record high of 40.2°C on 19 July 2022, and weeks like that are when demand for air con engineers peaks.
A service booked in March or April is going to find a slow leak or a failing capacitor before the first hot week, so it makes sure everything is working when the heat comes, instead of breaking after!
Air con service cost in Hounslow
In London, a home air con service costs £114–£180 including VAT for a single split system, or £168–£300 for a multi-split with 2–4 indoor units. That's above the UK average of £70–£120 per unit. The installer will confirm the price with you before the visit.
- Number of indoor unitsEach indoor unit adds cleaning time. A multi-split costs less than the same number of separate systems, because there's only one outdoor unit.
- AccessOutdoor units on flat roofs or high brackets take longer to reach safely.
- ConditionA heavily contaminated coil needs a chemical or antibacterial clean, typically £15–£30 extra per unit.
- What's not includedParts, refrigerant and leak repairs are quoted separately.
Service price estimator
Guide prices from a London service company's published rates (£95–£150 and £140–£250 plus VAT) and Checkatrade's UK cost guide, June 2026. Not a quote.
Service, deep clean or repair: which one you need
| Visit | When you need it | What's done | Typical cost |
|---|---|---|---|
| Service | Once a year, with the system working normally | Cleaning, measurements and safety checks | £114–£180 per single split in London |
| Deep clean | Musty smell, visible mould or a unit that hasn't been serviced for years | Chemical or antibacterial clean of the coil and fan barrel, added to a service | £15–£30 extra per unit |
| Repair | Not cooling, leaking, error code, breaker tripping | Fault diagnosis and part replacement or leak repair | £250–£650 for most repairs |
If the engineer finds a fault during a service, it's quoted separately. For more, see air con repair costs and when to replace instead.
Air con servicing and your manufacturer's warranty
Many manufacturer warranties, especially extended ones, require proof of regular servicing by a qualified installer. Without an official service record, a claim for a compressor or circuit board could be at risk, and those are the two most expensive parts to replace.
Check your brand's warranty terms and hang on to every service record. The installer leaves you a written record after each visit.
Before the engineer arrives
- Find the brand and modelThey're on the rating label on the side of the indoor or outdoor unit.
- Clear accessMove furniture from under the indoor units and clear a path to the outdoor unit.
- Note any symptomsTell the engineer about any smells, noises, drips or error codes so they know where to look.
Air con servicing: common questions
Does an air con service include a re-gas?
No. A healthy system never needs topping up, because the refrigerant circulates in a sealed circuit. If a service finds low pressure, there's a leak, and that's a repair job: the engineer finds and fixes the leak before adding any refrigerant.
Can a system that someone else installed be serviced?
Yes. Any F-Gas certified installer can service your system, whoever fitted it. Just have the brand and model to hand so they can check parts and warranty terms.
How do I clean my own air con filters?
Switch the unit off, lift the front cover of the indoor unit and slide out the mesh filters. Rinse them in lukewarm water, let them dry fully and refit them. Do this every 2–4 weeks while you're using the system regularly.
Does a heat pump used for heating need servicing too?
Yes, and it runs for more hours. If you use a split system for heating in winter, it's working through two seasons, so its filters and outdoor coil clog up faster than on a system that only cools.
Book an air con service in Hounslow
Email the brand, the number of indoor units and when it was last serviced, and we'll put you in touch with a local F-Gas certified installer who covers your postcode. They'll confirm the price and a date before they visit.