In a Dubai summer, most AC units run almost around the clock from May to October. By the time the weather cools, they have done more work than an AC in a cooler country does in years. That is why the autumn, not just the spring, is an important time to look after your AC.
What Summer Leaves Behind
After months of heavy use, a typical split or ducted unit has:
- Clogged filters full of fine dust and sand
- A coated indoor coil that cannot transfer heat as well
- Slime in the drain tray, the main cause of drips and ceiling stains
- A dusty blower wheel that moves less air and can smell musty
- An outdoor unit caked in dust, sometimes with leaves or nests
None of this stops the AC working straight away. But left until next summer, it means weaker cooling, higher bills and a higher chance of a breakdown on the hottest day of the year.
What an Autumn AC Service Includes
A proper service should:
- Clean or replace filters
- Wash the indoor coil and blower wheel
- Clear and treat the drain tray and drain line
- Wash the outdoor condenser coil
- Check refrigerant pressure, electrical connections and the capacitor
- Test the thermostat and the temperature of the air coming out
See AC maintenance, AC drain tray cleaning and AC cleaning.
Why Book It Now
- Technicians are less busy. In June, you may wait days. In November, slots are easier to find.
- Problems are found early. A weak capacitor or a slow refrigerant leak can be fixed in winter, not discovered in August.
- Mould is easier to stop. Cleaning the coil and tray now prevents the musty smell that builds up over the humid months.
Running Your AC in Winter
You will still use the AC on many winter days, especially in the afternoon and in apartments that get a lot of sun. A few habits keep it efficient:
- Raise the set point. In winter, 24 to 26 degrees is comfortable for most people.
- Use fan mode on mild days. It costs far less to run than cooling.
- Open the windows on cool, clear evenings and give the AC a rest.
- Close curtains on sunny windows in the afternoon to keep rooms cool.
- Keep cleaning filters every month or so, as dust does not stop in winter.
Rooms You Do Not Use
If you switch off the AC in a guest room or spare bedroom for weeks, run it in fan mode for a while every so often. This keeps air moving and helps stop musty smells. Before guests arrive, run it for an hour and check for drips.
Signs You Need a Repair, Not a Service
- The AC runs but the air is not cold
- Ice on the pipes or the indoor coil
- Water dripping every day
- The breaker trips when the AC starts
- Loud rattles, clicks or humming
These need a technician. See AC repair.
Split, Ducted and Fan Coil Units: What Changes in Winter
Different systems need slightly different care in the cooler months.
- Split units are the simplest. Clean the filters monthly and switch them off in rooms you are not using.
- Ducted systems in villas often serve several rooms. In winter, close the vents in unused rooms only if your system is designed for it, as closing too many can strain the unit. Ask your technician which ones can be closed.
- Fan coil units in towers on district cooling still need their drain trays and filters cleaned. Your chiller charges may change with the season, so check how your building bills them.
Keep a Service Record
Write down the date of each service and any repair, or keep the invoices in one folder. A simple record helps a technician spot a repeat problem, such as a drain that blocks every few months, and it is useful for landlords, tenants and future buyers.
Frequently Asked Questions
Do I Really Need an AC Service After Summer?
Yes, if your AC ran heavily through the summer. The autumn service cleans out what months of nonstop use left behind and finds worn parts while technicians are easier to book.
How Much Does an AC Service Cost in Dubai?
A split unit service typically starts from AED 150* per unit, and booking several units together usually costs less per unit. We confirm the price before we start.
What Temperature Should I Set My AC to in Winter?
Around 24 to 26 degrees is comfortable for most people in winter. On mild days, fan mode or open windows may be all you need.
Will an Autumn Service Lower My DEWA Bill?
A clean AC transfers heat more efficiently, so it runs for shorter periods to reach the same temperature. Combined with a higher winter set point, most homes see a noticeable drop in their bill.