Window air conditioners are a popular and convenient option for keeping indoor temperatures comfortable. While these appliances typically have a service life of up to a decade, the time will come when they need a replacement for you to continue enjoying cool indoor air. Here are a few signs that your window AC has reached the end of its useful life.

When Is It Time to Replace Your Window Air Conditioner?

1. Unpleasant Smells

Once an old window AC breaks down, internal components such as the fan motor or internal circuit board can deteriorate and produce metallic or smoky scents. The odor may be temporary if it results from layers of dust burning off after long disuse. However, if the smell persists, it could be due to plastic or metal parts scorching.

Other unwelcome smells can result from mold or mildew growth in the unit. These fungi result from a buildup of spores and moisture in sheltered areas such as the unit's housing, where the resulting colonies will produce unpleasant musty smells. Because mold is difficult to remove from an air conditioner, replacing the system will ensure the contaminant is out of the home.

2. Unusual Noises

After several years of use, you're probably accustomed to the noises an air conditioner usually makes while running. However, unusual sounds such as grinding, squealing, or clanking can indicate internal moving parts have come loose or damaged. 

If your unit is nearly or over 10 years old, repairing the underlying issue may cost more than the appliance is worth. In this case, investing in a new window air conditioner is often more cost-effective.

3. High Electricity Bills

It's normal for your cooling expenses to change with the seasons. However, if your recent utility bills are inexplicably higher than before, compare them to the statements from previous years. A noticeable shift in costs can indicate that the window AC is not running efficiently. Replacing the unit with a newer, more efficient model can bring your spending back into line with your budget.

Whether you need cooling repairs or a new window air conditioner, get in touch with the experts at Advanced A/C Contracting and Air Conditioning Essential Services Inc. in Honolulu, HI. Serving residents throughout Oahu, these HVAC professionals will test your system to identify common problems and recommend reliable repairs and upgrades. They can also provide efficient new units from leading manufacturers to keep your interiors cool and comfortable. Call (808) 847-4814 to schedule a service visit, and find out more about their services online.