Practical Air Conditioning Advice for Cape Town

Maintenance guide

Why Delaying Air Conditioner Maintenance Can Cost More Later

Air conditioners move large volumes of air through filters, coils and fans. Over time, dust and other airborne contamination can collect on these components. A unit may still switch on, but restricted airflow and dirty heat-exchange surfaces can reduce its ability to cool or heat the room effectively.

Condensate drainage also needs attention. Slime, dust and debris can restrict the drain line or build up in the drain tray. If water cannot leave the unit correctly, it may leak indoors or trigger a condensate pump or float-switch problem on systems that use them.

• Clean filters and airflow paths help reduce avoidable airflow restrictions.
• Coil and blower cleaning can support more effective heat transfer and air movement.
• Drain inspections can identify restrictions before they cause an indoor leak.
• Operational checks may reveal noise, corrosion, loose connections or declining performance.

Maintenance supports equipment care, but it does not guarantee lower electricity use, uninterrupted operation or freedom from future breakdowns. Results depend on the unit’s condition, sizing, installation and usage.

Deep-cleaning guide

10 Signs Your Air Conditioner May Need a Major Service

A removable-filter clean is useful routine care, but it does not always reach the evaporator coil, blower wheel, drain tray and other internal surfaces. A deeper clean may be appropriate when contamination has built up further inside the indoor unit.

• Airflow feels noticeably weaker than before.
• The room takes longer to reach the selected temperature.
• There is a damp, musty or unpleasant smell during operation.
• Dust or dark contamination is visible behind the louvres or on the blower wheel.
• Water drips or leaks from the indoor unit.
• The drain blocks repeatedly.
• The unit makes new airflow or fan noises.
• Dust is blown from the outlet when the fan starts.
• The system has operated heavily without a thorough internal clean.
• Filters become dirty unusually quickly because of the indoor environment.

These signs do not prove that cleaning is the only work required. Poor cooling, icing, noise and water leaks can also result from mechanical, electrical, refrigerant or installation faults. The system should be assessed before the correct service is recommended.

Drainage and repair guide

Why an Air Conditioner May Leak Water Indoors

During cooling, moisture from the room condenses on the indoor coil and should flow into the drain tray before leaving through the condensate drain. Water appearing indoors means that this process is not working correctly or that condensation is forming where it should not.

• A blocked or partly restricted condensate drain.
• Insufficient fall on a gravity-fed drain line.
• A failed, blocked or incorrectly installed condensate pump.
• A cracked, displaced or overflowing drain tray.
• Damaged or incomplete insulation on cold refrigerant piping.
• An indoor coil freezing because of restricted airflow or another system fault.
• An indoor unit that is not level or has moved on its mounting plate.

Switching the unit off can help prevent further water damage, but the cause still needs to be identified. Repeatedly clearing a drain without checking why it blocks may only provide a temporary solution.

Do not open electrical covers or continue operating a leaking unit when water is near wiring, plugs or electronic components. Arrange a professional inspection.

Coastal-care guide

How Salt-Laden Coastal Air Affects Outdoor Units

Outdoor air conditioning units near the ocean are exposed to salt-laden air, moisture and wind-driven contamination. These conditions can accelerate corrosion of cabinets, fasteners, coil fins and other exposed metal components.

Coastal care starts before installation. The outdoor-unit position, distance from direct sea spray, airflow clearances, drainage and access for cleaning should all be considered. Some models include factory-applied protective finishes, while optional specialist anti-corrosion treatment may provide additional protection for suitable new units.

• Select a suitable unit and installation position for the property.
• Keep the outdoor coil and cabinet free from heavy salt and dirt build-up.
• Inspect fasteners, brackets, coil edges and cabinet panels for early corrosion.
• Repair coating damage promptly where an approved repair method is available.
• Follow the manufacturer’s maintenance and warranty requirements.

No coating or treatment makes an outdoor unit completely corrosion-proof. Coastal exposure, maintenance frequency, installation position and the condition of the coating all affect the result.

Installation and sizing guide

How to Choose a Suitable Air Conditioner Size

A quick square-metre estimate can be useful as an early guide, but professional sizing should consider the actual heat load in the room. Two rooms with the same floor area may need different capacities because their windows, sunlight, insulation and usage are different.

• Room length, width and ceiling height.
• Window size, glass type, curtains and direct sunlight.
• Roof, wall and ceiling insulation.
• Number of people normally using the room.
• Computers, cooking equipment, lighting and other heat-producing appliances.
• Open doorways, adjoining spaces and air leakage.
• The required temperature, operating hours and Cape Town microclimate.

An undersized unit may run for long periods and still struggle to reach the desired temperature. An oversized unit may cycle differently than intended and can be less suitable for humidity control and stable comfort. Correct product selection also depends on available electrical supply, piping distance, outdoor-unit position and drainage requirements.

Repair decision guide

Should You Repair or Replace Your Air Conditioner?

A repair is often worthwhile when the system is in generally good condition, the fault is clearly identified and the correct replacement part is available at a reasonable cost. Replacement becomes more attractive when the equipment has several major concerns or no longer suits the space.

• The age and overall condition of the indoor and outdoor units.
• The confirmed fault and the total repair cost.
• Previous failures and repeated repair history.
• Availability and lead time of genuine or suitable replacement parts.
• Refrigerant type, leak condition and whether a reliable repair is practical.
• Corrosion, coil condition and compressor health.
• Whether the existing system is correctly sized and suitable for the room.
• Remaining manufacturer warranty and the terms that apply.

The cheapest immediate option is not always the lowest-cost long-term decision. Proper fault finding should come before replacing expensive parts or condemning the complete system. Airsense explains the findings and recommended work before additional repairs are carried out.