Dry mode is an air conditioner setting that removes moisture from the room while doing only light cooling. The unit slows its fan and runs the cooling coil gently, so water condenses out of the air and drains away. Use it on humid days when the temperature is fine but the room feels damp, and switch to Cool when you need the room colder.
Dry mode is an air conditioner setting that removes moisture from the room while doing only light cooling. The unit slows its fan and runs the cooling coil gently, so water condenses out of the air and drains away. Use it on humid days when the temperature is fine but the room feels damp or sticky, and switch to Cool when you actually need the room colder.
What dry mode does
Every air conditioner pulls some water out of the air. Warm, moist room air passes over a cold coil, the moisture condenses on it, and the water drains out of the unit. In Cool mode that drying is a side effect. In Dry mode it is the main job.
The makers describe it in slightly different words:
- LG says its dehumidification operation removes moisture "while maintaining a low cooling level."
- Senville's guide to its modes says Dry "runs at low fan speed to pull moisture from the air, with little change in temperature."
- GE's portable air conditioner manual (APCA and APWA models) calls it dehumidification only.
So the room gets drier, and it may also get a little cooler. Do not expect the temperature drop you get in Cool mode.
How dry mode works: the compressor and the fan
Dry mode still uses the compressor, because the coil has to be cold for water to condense on it. What changes is how hard the system runs.
Midea's Philippines site says its Dry Mode runs the fan and compressor at lower speeds. Midea's Latin American guide adds that the compressor usually switches on and off intermittently and the fan runs at a fixed, lower speed, which gives the air more time in contact with the coil. LG says the outdoor unit runs during dehumidification and supplies weak cooling, which is why you may still feel cool air from the vents.
Slower air is the point. ENERGY STAR gives the same advice for ordinary cooling on its room air conditioner page: on humid days, set the fan speed low, because slower air movement removes more moisture.
That is also why most units lock the fan speed in Dry mode. MrCool's mini split remote manual says the fan speed cannot be set in Dry mode because it is controlled automatically. GE says the fan runs at a fixed speed and does not show a set temperature in Dry mode. Pioneer's app guide says the same about fan speed.
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Where makers differ
The details vary by brand and by model:
- Set temperature: MrCool's remote manual has you set a temperature in Dry mode. GE's portable units do not take one.
- How dry it gets: Daikin Malaysia says Dry mode does not remove all the moisture and keeps the room at least at 60% humidity. Midea's Latin American guide gives a target of about 40 to 60%.
- Cold weather: LG says the function only works when the outdoor unit's operating conditions are met. Outside summer, with a low indoor temperature, the outdoor unit may not run, and dehumidification fails.
- Over-cooling: Mitsubishi Electric sells a Smart Dry mode on some units that it says improves humidity control with minimal over-cooling, which suggests ordinary dry modes can cool more than you want.
Your manual is the final word on what your own unit does.
When to use dry mode, and when not to
Use it when the air feels heavy but the room is not hot. Daikin Malaysia puts it simply: use Dry when the temperature is acceptable but the humidity is too high. Midea and Pioneer point to the same kind of day: humid, rainy or damp, but not very warm. Senville adds that drying the air helps prevent mold and musty smells.
How humid is too humid? The EPA's guide to mold and moisture says to keep indoor relative humidity below 60 percent, ideally between 30 and 50 percent. A cheap humidity meter tells you where you are. Condensation on windows is another sign of high humidity, according to the same EPA page.
A few habits help it work:
- Close windows and doors. GE recommends this for the best drying.
- Run it for a while, then check. Pioneer says a couple of hours should be enough to get humidity under control.
- Do not leave it on forever. Pioneer warns that removing too much humidity can make the room uncomfortable.
- Use the drying cycle if your unit has one. Pioneer's anti-mildew function starts after you turn the unit off and dries out leftover moisture.
When dry mode is the wrong tool
On a hot day, use Cool. Dry mode is designed for light cooling, and Pioneer says it becomes inefficient the hotter it gets outside. If the room is too warm, cool mode is the setting that lowers the temperature, and it removes moisture as it runs. Our dry mode vs cool mode comparison lays out the differences side by side.
For a wet basement, use a dehumidifier. Pioneer says dry mode is not meant to replace a dehumidifier. ENERGY STAR's dehumidifier buying guide sizes units for spaces that feel and smell damp, have damp spots on walls and floors, or have seepage, and it rates their capacity in pints of water per day. That is a different job from taking the edge off a muggy afternoon. If you already see mold in the unit itself, our guide on how to get rid of mold in an AC covers the cleanup.
In cool weather, expect it to struggle. LG's note about the outdoor unit not running in cold conditions means dry mode may do little in spring or fall on some models.
How to turn on dry mode
On most remotes you press Mode until Dry appears. The symbol is usually a water droplet. Senville, Midea and Daikin all describe a droplet for Dry. Here is what each maker's own documentation says:
| Brand | Button or symbol | Where it is documented |
|---|---|---|
| Senville | Press MODE to cycle Cool, Dry, Heat, Auto, Fan; Dry is the droplet | Senville help center |
| MrCool | Select Dry mode, set the temperature, turn the unit on | MrCool remote owner's manual |
| LG | Press Start/Stop, then Mode to switch to dehumidification | LG US support article |
| GE (portable) | Press MODE until the DRY indicator light is lit | GE APCA owner's manual |
| Midea | The water drop icon on the remote | Midea guide (Spanish) |
Not every unit has it. Midea says only select models include Dry Mode. If your remote has no droplet, check the manual before assuming a fault. Our guide to AC modes and remote symbols covers the other icons.
One more GE detail: after switching from Dry to Off or Fan, wait at least 3 minutes before going back to Dry. For long dehumidifying runs, GE tells owners of its portable units to connect a drain hose to a floor drain.
Does dry mode save energy?
The makers do not agree, and we found no ENERGY STAR or Department of Energy figure for it.
- Midea's Latin American guide says dry mode often uses less electricity than Cool and claims a cut of up to 20 to 30% in humid, mild weather. That is Midea's own claim, without test details.
- Daikin Spain describes its dry mode as working with low energy consumption.
- Pioneer says the opposite: its dry mode guide says the setting consumes more energy and is less efficient than other modes.
The fair reading is that it depends on the unit and the weather. What ENERGY STAR does say is that setting the thermostat as high as is comfortable, typically 78°F, saves energy. If drier air lets you stay comfortable at a higher setting, that is where any saving comes from. To see what your own unit costs per hour, try our cost to run calculator.
Frequently asked questions
What does the droplet symbol on my AC remote mean?
The water droplet is the Dry mode symbol on most remotes. Senville, Midea and Daikin all describe Dry with a droplet. On many units you press the Mode button until the droplet shows. Some brands label it Dry or Dehumidify instead, and not every model has it, so check your manual if you cannot find it.
Does dry mode cool the room?
A little. LG says its dehumidification mode provides weak cooling, so you may feel some cold air, and Senville says the temperature changes little. Dry mode is built to remove moisture, not to bring the temperature down. If the room is hot, Cool mode is the better choice, and it removes moisture too as it runs.
How long should I run dry mode?
Pioneer says a couple of hours is usually enough to bring humidity under control, and it warns that running it too long can make the air uncomfortably dry. A humidity meter helps: the EPA suggests keeping indoor relative humidity below 60 percent, ideally between 30 and 50 percent. Turn it off once you are in that range.
Can I use dry mode instead of a dehumidifier?
For a muggy room, often yes. For a damp basement or a space with seepage, no. Pioneer says dry mode is not meant to replace a dehumidifier, and Daikin Malaysia says its dry mode keeps the room at about 60% humidity rather than removing all the moisture. ENERGY STAR sizes dehumidifiers for damp and wet spaces by pints of water removed per day.
Why can't I change the fan speed in dry mode?
Because the unit controls it. MrCool's remote manual says the fan speed cannot be set in Dry mode since it is automatically controlled, and GE and Pioneer say the same for their units. The fan runs slowly on purpose: ENERGY STAR notes that slower air movement removes more moisture.
Founder of Home Caprice. Ben started the site to simplify HVAC after dealing with the heating and cooling in his first apartment.