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Why Removing the Unit Beats Leaving It In
ENERGY STAR's advice for the end of the cooling season is brief: pull the room air conditioner out of the window when that is practical, since a unit left in place lets heat escape, and if it has to stay, put a cover of the right size over it for the winter months. The reasoning is easy to follow. A window unit sits in an opening that was sealed around it for summer, and the same ENERGY STAR page notes that a poorly installed unit can leak as much air as a 6-square-inch hole. Once the compressor stops for the year, that opening is a path for cold outdoor air.
Taking the cabinet out also gives you a window of time to clean it, let the base pan dry, and put the unit away in a state you will be glad to find in spring. Leaving it in place is a legitimate choice and the makers address it, but it means a cover and a look at the outdoor side before the cold sets in. The sealing work that keeps summer air in is described in sealing the sides of a window AC, and the same panels are what you are opening up when the unit comes out.
Before It Leaves the Window
Frigidaire's storage page begins with taking the cabinet out, and points the owner to the installation instructions for that model for the how. That order matters. The manual for a specific cabinet describes how the window closes onto the unit, how the side panels are fitted, and what has to be undone before the cabinet will move. Frames are built differently from model to model, so a step that works on one cabinet can bend a panel on another.
Two jobs are easier while the unit is still in the window and still supported: cleaning the filter and dealing with the water in the pan. A filter that goes into storage loaded with dust tends to stay that way, and the first hot week of the next season is a poor moment to discover it. The steps for a washable filter are set out in how to clean a room air conditioner filter.
For power, the owner's manual gives the requirements for disconnecting the unit before it is moved. Follow that page for your model rather than a general routine.
Getting the Water Out of the Base Pan
GE Appliances explains how a window unit handles water while it runs. GE says the cabinet has no drain plug or drain hole for shedding excess water during operation. Instead, a ring around the rear fan blade, which GE calls a slinger ring, lifts water from the floor of the pan and flings it onto the condenser coils, which helps efficiency and removes some of the condensation and rain water. In high humidity or on rainy days the pan can overflow and drip outside, and GE calls that normal operation.
That changes when the unit comes out of the window. GE's drain plug page notes that some room air conditioners appear to have a plug at the bottom of the pan, that it should stay in place in ordinary use, and that its purpose is to let water out when the unit goes into seasonal storage or when a technician needs to empty the pan. The plug is a storage tool, not a running drain.
The ClearView window unit has a different layout, and GE's draining page lists the situations that call for draining it: an FL code on the display, a filter indicator, removing the unit from the window for a move or for seasonal storage, and winterizing a unit that stays in the window. On that model the drain cap sits on the right side of the indoor section, with a plug filter behind it, and the page walks through catching the water in a bucket. GE adds that the rubber plug on the bottom of the outdoor section is typically drained by a technician.
The general layout of plugs and trays is covered in drain plugs and water trays on room air conditioners. If water has been arriving inside the room rather than outside, that is a separate question, answered in window AC leaking water into the room.
Lifting It Out and Handling It
Frigidaire's instruction is to remove the unit with care, following the installation instructions for the model, and that is about as far as a maker can go for a cabinet it did not see installed. Two details from the same storage page shape how the unit should be held once it is free: it is kept standing as it runs, bottom down, and it should not rest on an end, the front face or the back. Handling it that way from the window to the storage spot avoids setting it down in a position it will not be stored in.
If the unit rests on an L bracket or a support bracket rather than on the sill alone, the bracket comes off or stays with the window according to its own instructions. The options are set out in L brackets and support brackets on a window AC. The outward tilt that lets a window unit drain in summer is worth understanding before the cabinet is lifted, because it explains why the unit sits the way it does: why a window AC must tilt toward the outside.
Where and How to Store It
Frigidaire's storage page gives the shape of the job. The unit goes in a dry location, standing the way it runs, with the bottom down, and it should not rest on an end, on the front face or on the back. A plastic sheet over the cabinet or the original carton is the cover, and Frigidaire ties the dry spot and the upright position to protection against rust and damage to electrical connections. If the spot is a garage or a basement, the page suggests raising the unit off the floor, since moisture, leaks or minor flooding can harm a cabinet sitting directly on concrete.
The position rule is the one people break. Standing a cabinet on its end saves floor space, but Frigidaire's page rules it out, along with resting the unit on its front or its back.
| Storage question | What the makers advise |
|---|---|
| Which position | Standing as it runs, bottom down, not on an end or a face |
| Which spot | A dry location, raised off the floor in a garage or basement |
| What to cover it with | A plastic sheet or the original carton |
| What to do about water | Drain the pan first; the drain plug is there for storage |
| What to do about the filter | Not covered by these storage pages; a clean filter is one less job in spring |
If the Unit Stays in the Window All Winter
Leaving the cabinet in place is allowed, and both sources address it. ENERGY STAR's suggestion for a unit that stays is a cover of the right size for the winter months. GE's ClearView page is more specific about a unit that is winterized in place: the outdoor side should be covered too, vents and louvers included, so cold air does not draft through them. The same page lists winterizing as one of the reasons to drain the indoor section on that model.
The cover matters because the cabinet is the seal. A cover sized for the unit closes the outdoor face; a loose sheet that leaves the louvers open does not. A unit that stays in the window should still be drained on the schedule its maker gives, so water does not sit in the pan through months when nothing is running.
Portable Units Stored Alongside
Midea's portable guidance answers the same question for a different cabinet. For a long storage period, Midea's advice is to empty the unit fully, wipe off any dampness, and wrap it in non-reactive plastic so dust stays out. Midea's drain method is a pan behind the unit and the drain cap unscrewed, with towels ready because the water starts immediately; tipping the unit back slightly gets the last of it. The full picture of how a portable deals with condensate is in how a portable AC handles the water it collects.
The two cabinet types differ in where the water sits, but the storage principle is the same: nothing wet goes into the off season, and nothing dusty goes into the next one.
Putting It Back in Spring
Reinstallation is the installation instructions in the order they were written: the bracket or sill support, the cabinet, the window closed onto it, then the side panels sealed. Sealing the sides of a window AC covers the panel work, and getting a room AC ready for the cooling season covers the rest, including the filter and the first run.
A unit that was drained, cleaned and stored bottom-down in a dry spot has nothing to correct in spring beyond the ordinary season-start jobs. That is the payoff for the work done in the fall.
Which to choose
| If you | Look for |
|---|---|
| If you kept the original carton | Use it. Frigidaire lists it alongside a plastic sheet as protection for the stored unit. |
| If the window unit is staying put over winter | A cover sized for the cabinet, with the outdoor vents and louvers closed off against cold drafts. |
| If the pan has a plug at the bottom | Leave it in place while the unit runs; GE says it is there for draining at storage time. |
| If the unit is going into a garage or basement | Keep it off the floor in a dry spot, per Frigidaire's storage page. |
| If the model is a ClearView saddle unit | Drain the indoor section at the cap on the right side before the cabinet is moved or stored. |
| If a portable is being put away too | Empty it fully and wrap it in non-reactive plastic, as Midea advises. |
Questions people ask
Can a window AC stay in the window all winter?
Yes. ENERGY STAR's guidance for a unit that stays put is a cover sized for the cabinet. GE's ClearView page adds that on a unit winterized in the window, the outdoor side should be covered as well, vents and louvers included, so cold air does not draft through them.
Should the drain plug be pulled before storage?
GE Appliances says the plug at the bottom of the pan should stay in place in ordinary use, and that its purpose is to let water out when the unit goes into seasonal storage or when a technician needs to empty the pan.
Does a window AC need draining before it is stored?
GE's ClearView draining page lists removing the unit from the window for storage as one of the reasons to drain it, and gives the cap and plug layout for that model. On units without that layout, the pan is where water collects during the season, and the maker's manual is the guide for the cabinet you own.
Can the unit be stored on its side or its end?
Frigidaire's storage guidance is specific: keep the unit standing the way it runs, with the bottom down, rather than resting on an end, the front face or the back.
Where is the best place to keep it for the off season?
A dry location. Frigidaire suggests that if the spot is a garage or a basement, the unit should be raised off the floor so moisture, leaks or minor flooding do not reach it.
What should be done with a portable AC at the end of the season?
Midea's advice for a long storage period is to empty the unit fully, wipe off any dampness, and wrap it in non-reactive plastic to keep dust out.