Air Conditioning Cleaning
If your air conditioning smells musty when it kicks in or the airflow just isn't what it used to be, it's usually a hygiene problem inside the indoor unit, not a fault. We clean the filters, coil, blower wheel and condensate parts so it runs fresh and clear again.
What's covered in a clean
A proper clean deals with every part that collects dust, moisture and odour inside the indoor unit, not just a quick filter wipe.
Filter Cleaning
Removing dust and debris from filters so the unit doesn't have to work harder for less cooling.
Coil Cleaning
Clearing dirt and moisture buildup from the indoor coil, which is often where musty smells start.
Blower Wheel Cleaning
Cleaning the blower wheel of trapped dust so airflow through the room is restored.
Condensate Tray & Drain Clearance
Clearing blocked trays and drains that cause water to back up and drip from the unit.
Why air conditioning starts to smell or lose airflow
Most domestic air conditioning in Brighton and the surrounding towns is a wall-mounted split system with no ductwork at all, so when something's not right, the cause is almost always inside the indoor unit itself. Dust settles on the filter, moisture and grime build up on the coil, the blower wheel picks up a layer of debris, and the condensate tray or drain can quietly clog. Any one of those on its own can make a system smell musty on startup, blow less air than it should, or start dripping.
A dirty coil is usually the biggest culprit behind that stale smell. Dirt sitting on a cold, damp coil is exactly the kind of environment where odour-causing buildup thrives, and no amount of running the unit on a colder setting will fix that. A blocked condensate tray or drain causes a different problem: water has nowhere to go, so it backs up and drips from the unit onto the wall or floor below it.
A clogged filter is the easiest of the four to picture. Air has to force its way through, the unit works harder to shift the same amount of cooling (or heating, since most modern systems do both), and you end up paying for effort that isn't turning into comfort.
A musty smell on startup is almost always a cleaning problem, not a breakdown.
More information
We treat this as a distinct job from an annual service. A service is a broader mechanical check of the whole system. This is specifically about hygiene: getting the filters, coil, blower wheel and condensate parts properly clean so the unit runs the way it should, smells the way it should, and stops dripping. If your system is genuinely ducted, which is uncommon in the homes we work in, we'll say so and deal with that separately rather than assuming it applies.
If anyone in the house has asthma or allergies, keeping these parts clean matters more than usual, since dust and microbial buildup on a dirty coil can affect the air being pushed round the room. It's not a replacement for proper ventilation or air quality measures, but it's a sensible, low-disruption step that makes a real difference to what's actually circulating.
We work across Brighton, Hove, Woodingdean, Worthing, Lewes, Shoreham-by-Sea, Haywards Heath, Seaford and Burgess Hill, on garden office units, bedroom splits, whole-home multi-split setups and small commercial systems in offices, shops and salons alike. Whatever the setting, the fix for a musty or sluggish unit is usually the same: get inside it and clean it properly. If the smell keeps coming back after a clean, or there's a persistent drip even once the drain's clear, that can point to something needing a closer look, and we'll tell you plainly if that's the case rather than just cleaning round it.
Worth considering
Air Conditioning Servicing
Annual air conditioning servicing that protects your manufacturer warranty and keeps running costs down, for homes and small premises across Sussex.
Air Conditioning Servicing→Air Conditioning Repair
Air conditioning not cooling, leaking, icing up or noisy? We diagnose the fault and fix it properly, with no quick top-ups, across Brighton and Sussex.
Air Conditioning Repair→Emergency Air Conditioning Repair
Emergency air conditioning repair and diagnosis for homes and businesses across Brighton, Hove and the surrounding Sussex towns.
Emergency Air Conditioning Repair→Commercial Air Conditioning Installation
Air conditioning installation for shops, salons, offices and cafes across Brighton, Hove and the surrounding Sussex towns, with minimal disruption to trading.
Commercial Air Conditioning Installation→Commercial Air Conditioning Maintenance
Planned air conditioning maintenance for shops, salons, offices and cafes across Brighton, Hove and the surrounding Sussex towns.
Commercial Air Conditioning Maintenance→Before you book
Straight answers about what an air conditioning clean covers and what it doesn't.
Is this the same as a full air conditioning service?
Will you clean the ductwork?
Why does my unit smell musty when it first switches on?
Why is my unit dripping water?
Can this help if someone in the house has asthma or allergies?
Do you cover commercial units too?
How much does a clean cost?
Do you cover my area?
Let's sort that smell or airflow drop
Call 01273 911551 and tell us what you're noticing, and we'll let you know what's involved in getting it properly clean again.
Call 01273 911551