Aircon Maintenance Service: What’s Included
Key takeaways
- A full aircon service covers cleaning the coils and filters, checking refrigerant gas pressure, testing electrical parts, and clearing the drainage line.
- Most split units in Gauteng do best with a professional service once or twice a year, plus a monthly filter check by the owner.
- Nearly half of the energy used in a home goes to heating and cooling, so a clean, well tuned aircon protects your electricity bill.
- Regular maintenance catches small faults early, which means fewer breakdowns during summer heat and load-shedding surges.
A proper aircon maintenance service cleans the parts that get dirty, checks the parts that fail, and confirms the unit is cooling safely and efficiently. In practice that means cleaning the coils and filters, checking the refrigerant gas pressure, inspecting the electrical connections, and clearing the drainage line so the unit runs the way it did when it was new.
If your aircon still works but feels weaker, smells musty, or your electricity bill has crept up, a service is usually what it needs. Below is a plain walk-through of what a full aircon maintenance service actually includes, how often to book one, and why it pays for itself across a Gauteng summer.
Step by step: what a full aircon maintenance service covers
A good technician follows the same checklist every time so nothing gets skipped. Here is the typical order of work on a residential split unit.
- Inspect and test on arrival. The technician switches the unit on, checks that it cools, and notes any noises, smells, or weak airflow before touching anything.
- Clean or replace the filters. The indoor filters are removed, washed, and dried, or swapped out if they are damaged.
- Clean the indoor evaporator coil and blower. Dust and grime on the coil block airflow and heat transfer, so this gets a careful clean.
- Clean the outdoor condenser coil. Leaves, dust, and Highveld grit collect on the outdoor unit and must be cleared for it to release heat properly.
- Check the refrigerant gas pressure. The technician measures the pressure to confirm the unit has the right amount of gas and no obvious leak.
- Inspect the electrical parts. Connections, the capacitor, the contactor, and the isolator are checked for wear, heat damage, or loose terminals.
- Clear the drainage line. The condensate drain and tray are flushed so water does not back up and leak into the room.
- Final test and report. The unit is run again, temperatures are checked, and the technician tells you what they found and whether anything needs attention.
You should always receive a clear explanation at the end. At Airconmaster we give an upfront written quote before any extra repair work, so a service never turns into a surprise bill.
Cleaning coils, filters and checking gas pressure
These three jobs sit at the heart of every service because they have the biggest effect on how well your aircon cools.
Filters trap dust, pollen, and pet hair. When they clog, the unit works harder to pull air through, which wastes electricity and strains the motor. ENERGY STAR notes that dirt and neglect are among the top causes of heating and cooling system failure, which is why cleaning starts here.
Coils are where the heat exchange happens. The indoor coil absorbs heat from your room and the outdoor coil dumps it outside. A layer of dust on either coil acts like a blanket and slows that exchange, so the room takes longer to cool and the compressor runs longer than it should.
Gas pressure tells the technician whether the refrigerant charge is correct. Low pressure usually points to a leak somewhere in the system. A service checks the pressure, but topping up the gas is a separate step called regassing, and it should only happen after the leak is found and fixed. If you want to understand where these costs land, our aircon repair cost guide for South Africa breaks down typical pricing.
Electrical and drainage inspection
The parts you cannot see are often the ones that cause a mid-summer breakdown, so a real service goes beyond a clean.
On the electrical side, the technician checks the capacitor and contactor, looks for scorched or loose wiring, and confirms the isolator switch works. This matters even more in Gauteng, where load-shedding means your aircon is switched off and back on far more often than it was designed for. Those surges are hard on electrical components, and a worn capacitor is a common reason a unit suddenly refuses to start.
On the drainage side, the condensate line and tray are flushed clear. When that line blocks, water has nowhere to go and drips down the wall or ceiling below the indoor unit. In humid summer weeks this is one of the most common callouts we see, and it is almost always avoidable with a quick drain flush during a routine service.
If your unit is blowing but not getting cold, it is worth running through our list of checks to do before you call a technician first, since a dirty filter or tripped breaker is sometimes the whole problem.
How often to schedule a service
For most Gauteng households, once a year is the sensible minimum. The best time is spring, before the first heatwave, so the unit is ready when you need it most.
Book more often if any of these apply to you:
- Twice a year for units in dusty suburbs, near busy roads, or in homes with pets.
- Every six months for offices, shops, restaurants, and other commercial spaces where the aircon runs all day.
- Before summer and before winter if you use the unit for heating as well as cooling, since a reversible unit works hard in both seasons.
Between professional visits, do one small job yourself: check the filters every month during heavy-use periods and clean them when they look grey with dust. That single habit keeps airflow strong and reduces the load on every other part.
Benefits: efficiency, lower bills, fewer breakdowns
A service is not just tidiness. It has a measurable effect on running cost and reliability.
Lower electricity bills. Heating and cooling is the single biggest energy draw in most homes. According to ENERGY STAR, nearly half of the energy used in your home goes to heating and cooling. A clean, correctly charged aircon reaches the set temperature faster and then rests, instead of grinding away against dirty coils. On the same page, ENERGY STAR notes that improper installation can reduce system efficiency by up to 30 percent, which is a reminder that both the install and the upkeep decide how much you pay each month.
Fewer breakdowns. Most aircon failures start small: a slightly low gas charge, a tired capacitor, a filter that has not been cleaned in two summers. A service catches these while they are cheap to fix, rather than during a December heatwave when the unit gives up completely.
A longer lifespan. A unit that runs cool, clean, and correctly charged is under far less strain, so the compressor and motor last longer. That delays the biggest cost of all, which is replacing the whole system.
Cleaner air and less smell. Clearing the coils and drain removes the damp, musty build-up that causes bad odours and irritates allergies.
Book your maintenance service
If your aircon is due for a service, or you cannot remember the last time it had one, now is the time to book, well before the summer rush. Airconmaster has been servicing aircons across Johannesburg, Pretoria, Centurion, Midrand, the East Rand, West Rand and the Vaal for over 15 years, with licensed, insured technicians and guaranteed workmanship on every job.
You get an upfront written quote before any work beyond the standard service, and a clear report of what your unit needs. Call us on 060 959 2231, send a WhatsApp, or request your free written quote online, and we will get a technician booked at a time that suits you.
Frequently asked questions
How long does an aircon service take?
A standard service on a single split unit usually takes 45 to 90 minutes, depending on how dirty the unit is and whether any small repairs are needed.
Does an aircon service include regassing?
A service includes checking the gas pressure, but regassing is a separate task. If the technician finds the refrigerant is low, they will explain why and quote the regas before doing it.
How often should I service my aircon?
Once a year is the minimum for a home unit. Units in dusty areas, offices, or hard-working commercial spaces do better with a service every six months.
Can I service my own aircon?
You can safely clean or replace the filters and wipe the indoor unit yourself. Coil cleaning, gas checks, and electrical work should be left to a licensed technician.
Talk to a qualified technician
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