How to Keep Your Goodmans Air Conditioner Running Efficiently

What Goodmans Air Conditioners Are and How They Work

Goodmans is a brand that manufactures window and portable air conditioning units sold primarily through major retailers. Their models range from small single-room units to larger capacity systems, and most are designed for straightforward installation without professional help. Understanding how your specific model works—whether it's a window unit, portable unit, or through-wall installation—is the first step to keeping it in working order and storing it properly during off-season months.

Like all air conditioners, Goodmans units pull warm air from your room, pass it over cold refrigerant coils, and push the cooled air back inside while venting hot air outside. The refrigerant circulates in a closed loop, so you won't need to refill it under normal circumstances. The compressor, condenser, and evaporator coils are the main mechanical parts that do this work, and they're sealed inside the unit's casing.

Key Takeaways

• Goodmans air conditioners need their filters cleaned or replaced every two to four weeks during heavy use to maintain cooling power and prevent mold growth inside the unit.
• The exterior condenser fins collect dust and debris that block airflow; cleaning them with a soft brush or vacuum every month keeps the unit from overheating and shutting down.
• Window units should be sealed with weatherstripping or foam tape around the edges to prevent cool air from leaking out and to stop insects and outdoor air from entering.
• Portable units need their exhaust hose checked for kinks and blockages, since a bent or clogged hose forces the compressor to work harder and shortens the unit's lifespan.
• Storing your Goodmans unit in a dry, temperature-controlled space during winter prevents rust, refrigerant leaks, and damage to the compressor from freezing.

Cleaning and Replacing Filters in Your Goodmans Unit

The filter in your Goodmans air conditioner traps dust, pollen, and pet hair before air enters the cooling coils. A clogged filter forces the compressor to work harder, uses more electricity, and allows dust to settle on the cold coils where it can trap moisture and grow mold. Most Goodmans models have a removable filter panel on the front or side of the unit.

Check your filter every two weeks during heavy use. If it looks gray or dusty, it's time to clean or replace it. For reusable filters, hold it up to a light source—if you can't see light through it, vacuum both sides gently with a soft brush attachment, or rinse it under lukewarm water and let it dry completely before reinstalling. For disposable filters, note the size printed on the frame (typically 12×24 inches or similar) and buy a replacement that matches exactly. Never run the unit without a filter, as dust will coat the coils and reduce cooling power within days.

Cleaning the Condenser Fins and Exterior Coils

The metal fins on the outside of your Goodmans unit—visible on the back or side panel—are where the hot air is released. These fins are thin and easily bent, and they collect dust, leaves, and outdoor debris that blocks airflow. When the condenser fins are clogged, the unit can't release heat properly, the compressor overheats, and the unit may shut itself off as a safety measure.

Once a month during cooling season, use a soft brush or the brush attachment on a vacuum to gently clean the fins from top to bottom. Work in the direction the fins run, not across them, to avoid bending them. If fins are bent, a fin comb (a small tool sold at hardware stores for around $10 to $20) can straighten them carefully. Never use a pressure washer, as the force can damage the fins and force water into the compressor housing.

Sealing Window Units to Prevent Air Leaks

Window air conditioners cool only the room they're in, so any gap around the unit lets cold air escape and warm air seep back in. This makes the compressor run longer and harder, wasting electricity and wearing out the unit faster. The space between the unit frame and the window frame is the main culprit.

Use weatherstripping tape or foam tape (sold at any hardware store) to seal the gaps on all four sides of the unit. Measure the perimeter of your window opening, buy tape that matches that length, and press it firmly into place. For larger gaps, use foam backer rod (a flexible foam rope) under the tape for better coverage. Seal the top and sides first, then the bottom. If your window has a sash that slides down over the unit, caulk the edges of the sash with paintable silicone caulk to close any remaining air leaks. Recheck seals at the start of each cooling season, as tape can shrink or peel over time.

Checking and Clearing the Exhaust Hose on Portable Units

Portable Goodmans air conditioners vent hot air through a hose that runs to a window or door. If this hose is kinked, crushed, or blocked by lint and dust, the hot air backs up inside the unit, forcing the compressor to work in a hotter environment than it's designed for. This shortens the unit's lifespan and reduces cooling power.

Once a week, visually inspect the entire length of the hose from the unit to the window. Look for kinks, bends, or places where the hose is pinched by furniture or a door frame. Straighten any kinks gently—do not use sharp tools that could puncture the hose. Check the window connection point to make sure the hose is fully inserted and not partially disconnected. If the hose feels warm to the touch along its length, it may be clogged; disconnect it from the unit and use a straightened wire coat hanger or a plumbing snake to push out lint buildup. Reattach it firmly and test the unit to confirm airflow has improved.

Storing Your Goodmans Air Conditioner During Off-Season

Storing your unit correctly during winter or when you won't use it for extended periods prevents rust, refrigerant leaks, and compressor damage. Before storage, run the unit on fan-only mode (no cooling) for 15 to 20 minutes to dry out any moisture inside the coils. This step is critical because water left in the coils can freeze and crack internal components.

Once dry, unplug the unit and let it sit for at least two hours before moving it. Store it in a dry, temperature-controlled space—a basement, garage, or climate-controlled storage unit works well. Never store it outdoors or in an unheated shed where freezing temperatures can damage the refrigerant lines and compressor. Keep it upright (not tilted or on its side) and cover it loosely with a cloth to keep dust off. Do not wrap it in plastic, as trapped moisture can cause rust. Before using it again the next season, clean the filter, check the condenser fins, and inspect the hose or window seals for damage.

Troubleshooting Common Goodmans Air Conditioner Problems

If your Goodmans unit is running but not cooling, the filter is the first thing to check. A clogged filter blocks cold air from reaching your room even though the compressor is working. Clean or replace it and wait 15 minutes for the coils to thaw if the unit has been running for hours. If cooling still doesn't improve, check the condenser fins for heavy dust buildup and clean them thoroughly.

If the unit is making unusual noises—rattling, grinding, or squealing—stop using it and unplug it immediately. Rattling often means a loose panel or debris inside the casing; open the front panel carefully and look for anything that shouldn't be there. Squealing can indicate a failing compressor or motor bearing, which requires professional repair. If the unit won't turn on at all, check that it's plugged in, that the outlet works (test with another device), and that any circuit breaker hasn't tripped. If the outlet is live and the unit still won't power on, the internal compressor may have failed and the unit will need replacement.

Frequently Asked Questions

How often should I clean the filter in my Goodmans air conditioner?

Check the filter every two weeks during active cooling season. If it looks dusty or gray, clean or replace it immediately. In very dusty environments or homes with pets, you may need to clean it weekly. A clean filter keeps the unit running efficiently and prevents mold from growing on the coils.

Can I use my Goodmans air conditioner in a window that doesn't open?

No. Window units need an opening to vent hot air outside. If your window doesn't open, a portable unit with an exhaust hose is your only option. Some portable models can vent through a sliding glass door or a custom-fitted panel in a fixed window, but the hose must reach outside.

What should I do if my Goodmans unit is leaking water inside the room?

Water inside the room usually means the unit is tilted backward (it should tilt slightly forward to drain outside). For window units, check that the frame is level and adjust the mounting bracket. For portable units, check that the drain pan isn't full and that the drain hose isn't kinked. If water is coming from the front panel, the coils may be frozen; run the unit on fan-only mode for 30 minutes to thaw them.

Is it normal for my Goodmans air conditioner to stop cooling after running for several hours?

No. If the unit cools at first but then stops, the evaporator coils are likely frozen. This happens when airflow is blocked by a dirty filter or when the room temperature is already very cold. Turn off the unit, clean the filter, and let the coils thaw for at least two hours before restarting. If freezing happens repeatedly, the refrigerant charge may be low, which requires professional service.

Can I leave my Goodmans air conditioner in the window during winter?

It's better to remove it. Winter wind and temperature swings can damage the seals, and water can enter the compressor housing and freeze. If removal isn't practical, seal all gaps with weatherstripping and cover the exterior with a fitted air conditioner cover to protect it from weather. Remove the cover and inspect the unit before using it again in spring.