West Haven, Connecticut
325 Morgan Ln
West Haven, CT 06516
(203) 934-3835

3 Window AC Maintenance Tips July 31, 2019

West Haven, New Haven County
3 Window AC Maintenance Tips, West Haven, Connecticut

Window-mounted AC units can keep you comfortable without significantly increasing your energy bills. They come in many sizes ranging from 5,000 BTUs to 25,000 BTUs. Although repairs should be performed by an HVAC contractor, basic maintenance can be handled by homeowners. Here’s what you need to know. 

How to Maintain a Window AC

1. Clean the Filter

Window AC units have washable foam, carbon, or mesh filters. They are easy to remove. However, check your AC manual for removal specifics. Inspect the filter for damage. If you find any, replace it right away. Damaged filters allow dust, insects, and allergens into your home. If it’s in good shape, clean it with mild dish detergent and warm water, and set it out to dry before placing it back into the unit.

2. Check for Insects & Animal Nests

hvac contractorUnplug the device and remove the outside cover. Next, look for signs of small animals or insect nests. For example, wasps and bees will often make their homes inside of AC units. Vacuum them out and place the outside cover back on the unit. 

3. Clean the Condenser Coils

Generally, the coils are located in the front of the AC unit. Remove the front plate, un-mount the AC unit, and take it outside. Vacuum the condenser coils with a soft brush attachment. Check the coil fins, and if any are bent, use a fin comb to straighten them. When purchasing a comb, check the user manual for the coil fin teeth count. Coil fins can cut you, so either have an HVAC contractor do the job or use leather gloves when cleaning.


When you need help maintaining your window AC unit, contact the HVAC contractors at Apple Oil. For more than 50 years, they’ve served homeowners and business owners throughout Fairfield and New Haven counties, CT. They specialize in AC and oil furnace installations, maintenance, and repairs. They also offer heating oil, including same-day delivery if you call by noon. Plus, brand new customers get a discount on their first delivery. Visit this HVAC contractor online or call (203) 934-3835 to learn more about their services.