Common air conditioning problems & solutions

The section walks through five distinct faults, grouped by the symptom you actually notice first. Aircon leaking water covers dripping or pooling under an indoor unit, usually a blocked condensate drain, frozen coil or damaged drain pan. Aircon making noise or icing up interprets buzzing, rattling, hissing and squealing, plus frost forming on the coils. Aircon not cooling tackles a unit that runs but only blows warm air. Aircon smells musty explains the stale, damp odour that signals mould or biofilm on the coil, drain pan or ducts. Aircon tripping the breaker deals with a unit that repeatedly trips the breaker or earth leakage, drawing more current than the circuit can safely handle.

Although the visible symptoms differ, the underlying causes overlap a great deal. A dirty filter or restricted airflow shows up behind leaking, ice building up on the coils, weak cooling and a breaker that keeps tripping alike, while low refrigerant links freezing coils, poor cooling and hissing noises. That is why several problems point to the same fixes and, in some cases, the same technician visit.

Each problem separates the safe DIY checks from the work that legally requires a professional. Homeowners can switch off at the breaker, inspect and replace filters, clear a minor drain clog, thaw an iced coil with the fan on, or clear debris around the outdoor unit. The line is firm on two things: refrigerant handling legally requires a SAQCC Gas-registered technician in South Africa, and electrical diagnosis, capacitor or compressor work, and sealed-component repairs should be left to a qualified technician. What drives the cost is which of these applies, ranging from a routine service and drain flush up to compressor or capacitor replacement and a refrigerant regas.

The problem pages route you to the services that typically fix each fault, most often aircon repair, aircon service and maintenance, and aircon regas, with cost context drawn from the aircon prices guide. When you are ready, the free quote-comparison flow matches you with independent technicians across Sandton, Randburg, Roodepoort, Fourways, Midrand, the CBD and JHB South, so you can request up to three written quotes (up to five where available) and compare parts, labour and timelines side by side.