Air Conditioner Remote Symbols Explained (All Brands)

Most air conditioner remotes use the same five mode symbols: a snowflake for cool, a sun for heat, a water drop for dry, a fan for fan-only, and a looped arrow or the letter A for auto. Timers, swing, eco and powerful modes vary more between brands. The table below covers the symbols almost every remote shares, and the brand directory further down links to a guide for your make.

Every air conditioner remote uses pictures instead of words, and almost none of them explain what the pictures mean. You end up pressing buttons until the room feels right, which works until the day it does not.

The good news is that air conditioner symbols follow a shared visual language. A snowflake means the same thing on a Daikin as it does on a Mitsubishi, an LG or a Fujitsu, because the symbols were standardised long before the brands started adding features of their own.

This guide explains the symbols every brand shares, the ones that differ only in name, and how to work out what an unfamiliar icon is doing on your screen. It applies whether you have a handheld remote, a wall controller, or a ducted system with a touchscreen.

The five air conditioner symbols every brand shares

Mode is the setting that decides what the system actually does. Get this wrong and nothing else on the remote will save you.

• A snowflake is cooling. Heat is taken out of the room and rejected outside.
• A sun is heating. Heat is drawn in from outside air, even when it feels cold out there.
• A water drop is dry, sometimes labelled dehumidify. Moisture is removed and the fan runs slowly.
• A fan blade is fan only. Air moves and nothing is heated or cooled.
• A combined symbol, or the word auto, lets the unit choose between heating and cooling.

Those five are near universal. If you learn nothing else from this page, learn these, because they account for most of the occasions when a system seems to be running and achieving nothing.

Fan only is the classic. The unit hums, air comes out of the vents, the room stays exactly as warm as it was, and everybody assumes the air conditioner has failed.

Why auto mode causes more complaints than it solves

Auto sounds like the sensible choice and often is not. The unit compares the room temperature to your setting and picks heating or cooling on that basis.

On a mild day that logic can produce heating when you wanted cooling, or a system that switches between the two as the room drifts. It is doing exactly what it was told.

If you want a room cooler, choose cooling directly and set a temperature several degrees below the room. It removes the ambiguity and it is the single most useful habit for anyone whose system feels unpredictable.

Aircon symbols for fan speed

Fan speed is almost always a row of bars, a fan that fills in, or a set of curved lines that grows. More bars means more air.

• Auto lets the unit choose, running hard when the room is far from your setting and easing off as it gets close.
• Low or quiet is the slowest, intended for bedrooms and overnight running.
• Medium sits in the middle for general use.
• High moves the most air and is the fastest way to shift a room.
• Some brands add a top step above high for a short burst of maximum airflow.

Auto is the right default in most rooms. A remote left on its lowest setting is a very convincing impersonation of a failing air conditioner, and it is worth ruling out before anything else.

Airflow direction and swing symbols

These control the louvre, the wide flap across the outlet that aims the air. The symbol is usually a small bar with an arrow, or a bar with an arc showing movement.

Swing moves the louvre continuously. A fixed position holds it where you put it. Auto sets it to whatever the unit considers most efficient for the current mode.

The physics here is simple and useful. Cold air sinks and warm air rises, so cooling works best with the louvre angled high and heating works best with it aimed at the floor. A room that heats the ceiling while your feet stay cold is very often a louvre problem rather than a capacity problem.

The same feature, four different names

This is where brands diverge, and it is the main reason a symbol chart from one manufacturer confuses someone who owns another. The functions are broadly similar. The names and icons are not.

• A leaf usually means an economy or energy saving function, which limits how hard the system will work.
• A crescent moon usually means sleep or night mode, which softens the temperature overnight and often dims the indoor display.
• A rocket, a plus sign, or the words powerful, turbo or jet all mean the same thing, a short burst of maximum output.
• A person or an eye symbol means an occupancy sensor, which adjusts operation based on whether anyone is in the room.
• A snowflake with lines, or a separate purifying symbol, usually means an air treatment function rather than a cooling one.

Burst functions are worth understanding, because several brands cancel them automatically after a set time. If a setting seems to switch itself off, that is usually by design rather than a fault.

Timer and clock symbols

Timer symbols explain more mystery faults than any other group. A clock face, or the words ON and OFF beside a time, is what you are looking for.

• An on timer holds the system off until its set hour arrives, which looks exactly like a unit that will not start.
• An off timer stops the system at a set hour regardless of how the room feels.
• A weekly or schedule timer runs a program across the whole week.
• A separate clock symbol on some controllers warns that the clock itself needs resetting.

That last one is easy to underestimate. If the clock has lost its setting after a power interruption, every timer on the system now runs at the wrong hour, and fixing the schedule without fixing the clock just moves the problem.

The filter symbol and what it is really telling you

A filter symbol, often a small grille or a group of stacked lines, is a maintenance reminder rather than a fault.

On most systems it is driven by running hours rather than by anything the unit measures, so it appears on schedule whether your filters are dirty or spotless. It also will not clear itself, so it stays on screen after you clean them until you reset it.

1. Switch the unit off before opening the indoor unit.
2. Slide the filters out and wash them in lukewarm water.
3. Let them dry fully, because a damp filter feeds mould growth inside the unit.
4. Refit them and close the panel.
5. Reset the filter indication from the remote or controller.

Blocked filters cause a whole family of complaints that look far more serious than they are, including systems that cool for a while and then stop. Our guide to how often you should service your air conditioner covers what else is worth doing each season.

The key lock symbol

A padlock means the controls are locked. It is the reason a remote or wall controller can appear completely dead while the system carries on running normally.

Key lock is common in offices, rentals and shared spaces, and it is easy to trigger by accident on a handheld remote, usually by holding a button longer than intended.

If the screen is lit but no button does anything, look for this symbol before deciding the controller has failed.

Symbols that mean the system is protecting itself

A handful of symbols appear during normal running and worry people unnecessarily. They are all temporary.

• A defrost indication appears in heating while the outdoor coil sheds ice. The indoor unit stops delivering warm air while it happens.
• A preheat or hot start indication holds the indoor fan back until the coil is warm, so you are not hit with cold air at the start of a heating cycle.
• A standby indication means the unit is powered and waiting rather than running.
• Some systems briefly show a symbol during their restart delay, which holds the compressor off for a few minutes after a stop or a mode change.

None of these is a fault. Every one of them ends on its own, and a system doing any of them is behaving exactly as designed.

Symbols on the indoor unit rather than the remote

Not every signal lives on the remote. The lamps on the indoor unit report what the system is doing, and they use their own language.

• A steady lamp usually means the unit is running toward your set temperature.
• A slowly blinking lamp often means the room is approaching that temperature.
• A lamp blinking in a repeating pattern, with the system stopped, is a fault indication.
• A dimmed or dark panel with the system still running usually means night mode is on.

That third one is the only one that needs attention. Count the pattern and write it down before switching anything off, because a power cycle clears the record.

What does the snowflake symbol mean on an air conditioner?

The snowflake is cooling mode on every major brand. The system removes heat from the room and rejects it outside until the room reaches your set temperature.

If the snowflake shows and the air is not cold, check the set temperature, check the filters, and give the system a few minutes in case it is still inside its restart delay.

What does the water drop symbol mean?

The water drop is dry mode, which removes humidity rather than chasing a temperature. It runs the fan slowly by design, so weak airflow in this mode is expected.

It suits a humid but mild day. On a hot afternoon, cooling mode will do considerably more for the room.

What does the leaf symbol mean on an air conditioner?

A leaf generally indicates an economy or energy saving function. The system limits how hard it will work, usually by widening the temperature band it will accept or by capping the compressor.

It saves money and it also slows the system down. On a very hot day it can make a healthy air conditioner feel underpowered, so it is worth switching off before concluding anything is wrong.

Why does my remote show a symbol that is not in any chart?

Because symbol sets vary by controller, not just by brand. A chart written for a wall controller will not match a handheld remote, and a guide for a large commercial system shows symbols a home split system never displays.

The definitive reference is the manual for your exact controller model. That model number is usually printed on the back of a handheld remote, or on the underside of a wall mounted one, and it is not the same as the air conditioner model number.

Brand by brand differences worth knowing

The mode symbols are shared. The extra functions are where each manufacturer goes its own way, and the detail matters if you are trying to work out why your system behaves the way it does.

• Our guide to Mitsubishi air conditioner symbols covers the vane positions, econo cool, powerful and the indoor lamp behaviour, and explains the difference between the two separate Mitsubishi companies selling in Australia.
• Our guide to Daikin air conditioner symbols covers the wall controller symbols that most homeowners never see, including setback, centralised control and the clock reset warning.
• Our guide to Fujitsu air conditioner symbols explains the three indicator lamps on the indoor unit and how a fault is reported by blink pattern rather than by text.
• Our guide to LG air conditioner symbols covers jet mode, graduated energy saving and the set of extra functions hidden behind the function button.
• Our guide to Hitachi air conditioner symbols covers FrostWash, Leave Home, Silent, Smart Eco and My Mode, and explains the padlock that locks the controls.

If your brand is not covered yet, the universal symbols above will still get you most of the way, and your controller manual will fill the rest.

Find your brand

A quick way to read any unfamiliar display

When a system is not doing what you expect, the display usually holds the answer. Work through it in this order rather than guessing.

1. Find the mode symbol first, because fan and dry both run without changing room temperature.
2. Compare the set temperature to how the room actually feels.
3. Check the fan speed, since the lowest setting mimics a failing system.
4. Look for a timer symbol, the likely reason a unit will not start.
5. Look for a padlock if the buttons are not responding.
6. Look for an economy or sleep symbol if the system feels underpowered.
7. Check the filter indication, then check the filters themselves.
8. Look at the lamps on the indoor unit, which report what the system is doing rather than what you asked for.

Eight checks, no tools, and between them they explain the large majority of calls that end without a single part being fitted.

When the symbols are fine and the room still is not

Sometimes the display reads perfectly and the system still underperforms. At that point the cause is usually physical rather than a setting.

• Filters blocked enough to starve the indoor coil of air.
• An outdoor unit crowded by plants, fencing or stored items so it cannot reject heat.
• Doors and windows open onto space the system was never sized to handle.
• A refrigerant charge that has dropped, which shows up as performance fading over weeks rather than failing overnight.

The first three cost nothing to address. The fourth needs a licensed technician, because refrigerant work is licensed in Australia for good reason. If the system runs without ever cooling the room, our guide to an air conditioner not cooling works through the causes in order.

Getting the most from the remote you already have

Almost every air conditioner symbol belongs to one of five groups. A mode, an airflow setting, a comfort or efficiency function, a timer, or a status note telling you what the system is doing on its own.

Once you can place an unfamiliar symbol in its group, the meaning is usually clear from where it sits on the screen and what changed when it appeared.

If you have read the display correctly, cleaned the filters and the system still will not perform, the next step needs test equipment. We service split, multi head and ducted systems across Melbourne, and the price is confirmed with you before any work starts.

If you want to put a figure on what your system costs to run, our air conditioning running costs calculator works it out from your own nameplate figure and your own electricity rate.

If the symbols are all set correctly and the air is still not cold, our guide on why an air conditioner is not blowing cool air picks up from there.

For general advice on staying safe around electrical appliances at home, see Energy Safe Victoria.

Reviewed by AC repair and service specialist on 22 October 2026. How we write our articles