How to Use your AC Remote & System Modes in Perth
Navigating the settings on your air conditioner controller can feel a bit overwhelming with all those symbols and options.
Our team sees it on service calls all the time across Perth. Most homeowners stick to one button and hope for the best, missing out on massive power savings and better comfort.
Every mode on your controller serves a specific purpose. Knowing when to switch modes based on our unique local climate will lower your Western Power bills and stop your outdoor unit from overworking.
Cooling Mode (The Snowflake Symbol)
Cooling mode is your front line of defence when those scorching 40°C summer heatwaves hit Perth and its surrounding suburbs.
Your indoor unit pulls warm air through the return grille, cools it across the evaporator coil using refrigerant, and sends it back into your rooms. The outdoor compressor works hard to release that trapped heat into the air outside.
Avoiding Compressor Burnout
Never set your cooling mode below 20°C on extremely hot days.
If it is 42°C outside and your home is double-brick construction, setting your air conditioner to 18°C forces your compressor to run full tilt for hours without stopping.
Aim for 23°C or 24°C instead (or even 25°C – 26°C). Your system will reach the setpoint naturally, cycle off regularly, and protect your compressor from premature failure.
Heating Mode (The Sun Symbol)
Modern reverse cycle air conditioners are exceptionally efficient heaters for cold Perth winters.
Instead of burning element wire like a space heater, the system works in reverse by extracting heat energy from the cold outside air and pumping it inside your home.
Squeezing Warmth Out of Cold Air
Set your heating controller between 18°C and 20°C during those freezing mornings.
Remember that hot air rises straight to your ceiling. Manually adjust your wall split or ducted louvres to point directly down at the floor so the warmth stays where you actually sit.
Dry Mode (The Water Drop Symbol)
Dry mode acts like a built-in dehumidifier, pulling excess moisture out of the air while providing light cooling.
In Perth, dry mode is an absolute lifesaver when the Fremantle Doctor rolls in during late summer, bringing sticky coastal humidity straight past Scarborough and Cottesloe.
Lowering Humidity for Less Energy
High humidity makes a 28°C room feel like a sauna because your sweat cannot evaporate properly.
Dry mode slows down the indoor fan speed to let air linger over the cold coil, stripping water vapour out of the atmosphere without running the compressor at maximum speed.
You get a fresh, crisp indoor climate while drawing significantly less power than standard cooling mode.
Fan-Only Mode (The Fan Blade Symbol)
Fan-only mode simply circulates the air inside your home without turning on the outdoor compressor at all.
This setting is ideal for mild spring or autumn days when the temperature outside is comfortable, but the air inside your living areas feels a bit stale.
Because the outdoor unit stays completely asleep, fan-only mode uses a fraction of the electricity, keeping your power bills virtually untouched.
Auto Mode (The Recycled Arrows Symbol)
Auto mode lets your controller decide whether the system needs to heat or cool based on your target room temperature.
While this sounds convenient, our trade team generally advises against using auto mode during Perth shoulder seasons.
On a typical October day, a cool morning might trigger the heating, only for the afternoon sun to kick the system straight into cooling. Manually locking in your preferred mode gives you far tighter control over your power usage.
Eco Mode (The Leaf Symbol)
Eco mode caps the maximum power consumption of your compressor and adjusts fan speed to match room conditions.
It prevents the system from running at peak capacity, smoothing out power spikes without letting your home get uncomfortably warm or cold.
If you have rooftop solar panels, running your system on eco mode during peak generation hours (10 AM to 2 PM) allows you to pre-cool your double-brick thermal mass almost completely for free.
Sleep Mode (The Moon or Star Symbol)
Sleep mode is designed to balance overnight comfort with energy savings while you are in bed.
Once activated, the system gradually adjusts the setpoint by 0.5°C to 1°C per hour, up to a maximum of 2°C or 3°C over the night.
As your body metabolism slows down during sleep, you naturally require less active cooling or heating. Sleep mode also ramps down the indoor fan speed, ensuring whisper-quiet operation while you rest.
Turbo Mode (The Speedometer Symbol)
Turbo mode forces your indoor fan and outdoor compressor to operate at maximum capacity for a short burst.
It is designed to blast a hot or freezing room with high-velocity air to reach your desired temperature as fast as humanly possible.
Most manufacturers build an automatic 30-minute timer into turbo mode so your system does not stay locked in overdrive, conserving power once the initial temperature drop is achieved.
The Bottom Line on AC Modes
Understanding your remote settings allows you to run your system far more efficiently all year round.
Keep your filter clean, match your mode to the daily humidity and weather conditions, and avoid extreme setpoints that strain your system.
Treat your reverse cycle setup with a bit of respect, and it will keep your family comfortable through every Perth season without destroying your budget.
What is the best mode to run on a humid afternoon in Perth?
Dry mode is the best setting when coastal humidity spikes. It strips moisture out of the room without overworking the compressor, keeping you comfortable for a fraction of the running cost.
Why should cooling mode never be set below 20°C?
Setting your controller below 20°C on a blistering hot Perth day forces the outdoor unit to run continuously at full capacity. This causes massive power bills and drastically shortens the lifespan of your compressor.
Does fan-only mode cool the room?
No. Fan-only mode simply moves the air around your home like a ceiling fan. It does not engage the refrigerant system or lower the actual room temperature, but it uses very little electricity.
How does sleep mode save money overnight?
Sleep mode slowly raises the cooling setpoint by a couple of degrees over several hours while reducing fan noise. This reduces the workload on your compressor overnight while maintaining a comfortable sleep environment.