Aircon cleaning in Cape Town is usually requested for one of two reasons: the unit smells, or it is blowing far less air than it used to. Both trace back to the same place — the evaporator coil and the blower wheel inside the indoor unit.
This is a cleaning job rather than a repair, and it is priced differently from a standard service.
Tell us how many units and what you are noticing, and get cleaning quotes from local contractors.
Get Cleaning QuotesWhy Aircons Smell
The evaporator coil is cold and wet whenever the unit runs. Dust that gets past the filter sticks to it, and the combination of dust, moisture and darkness grows biofilm and mould. The blower wheel behind it collects the same, packed into the blades where a wipe-down will never reach.
That is why a smell usually comes back within weeks of a light service. The filters were cleaned; the source was not touched.
Signs a Unit Needs Cleaning Rather Than Repair
- A musty or sour smell for the first few minutes after switching on.
- Noticeably less air out of the vent, at the same fan speed.
- Black or grey specks blown out of the louvres.
- Visible fur or mould on the coil fins behind the filter.
- Water dripping from the indoor unit, where the tray has silted up.
- Longer run times and a higher bill without any fault code.
People with asthma or allergies usually notice a fouled unit before anyone else in the house. If one room reliably triggers symptoms and it has an aircon in it, look at the unit before rearranging the room.
What a Chemical Deep Clean Involves
- Power isolated and the indoor unit opened up.
- Protective bag fitted around the unit to catch the run-off.
- Coil treated with cleaner, left to work, then rinsed through under pressure.
- Blower wheel cleaned or removed and cleaned separately, blade by blade.
- Drain tray, drain pan and drain line flushed.
- Louvres, filters and casing washed.
- Outdoor condenser coil cleaned from the inside out.
- Reassembled, run up and drainage confirmed under load.
Aircon Cleaning Prices in Cape Town
| Job | Indicative range | Notes |
|---|---|---|
| Standard clean as part of a service | R650 – R1,400 | Filters, accessible coil faces, drain |
| Chemical deep clean, wall split indoor unit | R1,200 – R2,800 | Bagged, coil and blower wheel cleaned |
| Chemical deep clean, ceiling cassette | R1,800 – R3,800 | More work to open and refit |
| Blower wheel removal and clean | +R600 – R1,500 | Where it is packed rather than dusty |
| Outdoor condenser coil clean | R650 – R1,500 | Often bundled with the indoor clean |
| Drain line flush and unblock | R450 – R1,200 | Sometimes included in the deep clean |
| Anti-bacterial or sanitiser treatment | R350 – R900 per unit | Optional, and not a substitute for cleaning |
| Multiple units, same visit | Per-unit rate drops | Ask for the rate on the full count |
Indicative Cape Town ranges, not a quotation. The gap between a service clean and a chemical deep clean is scope, not markup. If the complaint is a smell, confirm the blower wheel is in the quote — without it the smell returns.
Describe the smell or the airflow problem and compare cleaning quotes from local contractors.
Compare Cleaning PricesKeeping It Clean
- Rinse the filters monthly through summer. It is five minutes and it prevents most of the fouling.
- Run the unit on fan-only for a few minutes before switching off, so the coil dries rather than sitting wet.
- Keep the outdoor unit clear of leaves, creeper and stored items.
- Clear the drain outlet where it discharges; blockages usually start at the end.
Frequently Asked Questions
How much does aircon cleaning cost in Cape Town?
A chemical deep clean on a wall-mounted split unit commonly runs R1,200 to R2,800 per indoor unit. Ceiling cassettes are higher because of the work in opening and refitting them.
Why does my aircon smell bad?
Almost always mould and biofilm on the wet evaporator coil and packed into the blower wheel. Cleaning the filters does not reach either, which is why the smell comes back after a light service.
Can I clean my aircon myself?
You can and should clean the filters, and you can vacuum visible dust from the coil face gently. The blower wheel and the coil interior need the unit opened, bagged and pressure rinsed, which is where it becomes a contractor job.
How often should an aircon be deep cleaned?
Every two to three years suits a normal domestic unit. Kitchen-adjacent units, coastal properties and units that run continuously want it more often.
Will cleaning fix weak airflow?
If the cause is a fouled filter, coil or blower wheel, yes, and the improvement is usually immediate and obvious. If airflow is still weak after a proper clean, the next suspect is the fan motor or the capacitor.
Cleaning is quoted through Aircon Installers Cape Town alongside servicing, repairs and installation.
Related Aircon Services
Aircon Installers Cape Town is a free quote-matching service. We do not install, repair or service air conditioners ourselves. Every quote comes from a LEADERR APPROVED local contractor, and your contract is with the business you appoint. Assess each quote on its own merits before appointing anyone.
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