6 Common Air Conditioner Smells Decoded and How to Repair the Problem

April 21, 2021

When your air conditioner is clean and operating correctly, it’s expected you won’t be smelling anything weird. Unusual air conditioner noises and weird smells are a hint that something is up. If your air conditioner is getting older or you haven’t had maintenance scheduled recently, they can be a sure sign you need skilled air conditioning repair in Wisconsin Rapids.

Here are six of the most common air conditioner smells and how you can fix them.

1. Central Air Conditioner Smells Like Chemicals

If your air conditioner smells bad when turned on, particularly a chemical odor, isn’t a great sign. You may also notice your:

  • Air conditioner smells like paint thinner
  • Home air conditioner smells sweet

These sweet, chemical smells are regularly a sign that your air conditioner has a refrigerant leak. Your system relies on this gas to shift heat through copper coils, which can break out as time passes.

4 Clues You Have a Refrigerant Leak

In addition to the strange smell, here are four other hints that you are experiencing a refrigerant leak.

  1. Bubbling or hissing sounds when your air conditioner is cooling.
  2. Ice crystals on refrigerant lines or the evaporator coil.
  3. It’s hard keeping your house cold or achieving your set temperature.
  4. Increasing electrical expenses.

How You Can Take Care of It

A refrigerant leak requires skilled support from a heating and cooling company like Rapids Sheet Metal Works Inc. Your cooling specialist will pinpoint and repair the leak before recharging your air conditioner with refrigerant.

Fixing a refrigerant leak often costs between $225 and $1,600, according to nationwide averages put together by HomeAdvisor. Your precise cost will depend on the location and severity of the leak, as well as how long it requires to solve.

If your air conditioner was installed early than 2010, it’s likely it has R-22 or Freon refrigerant. This refrigerant is no longer being made because of its harmful effects on the ozone layer. Due to this, repairs can be very expensive so it may be smartest to consider air conditioning installation in this situation.

2. Air Conditioner Smells Like Gas

If your air conditioner smells like rotten eggs, there’s probably nothing wrong with it. But there’s a high likelihood you have a natural gas leak in your home. Natural gas has a sulfur-like additive to warn you when there’s a leak, since the gas can be fatal in large amounts.

How You Can Repair It

If you notice a sulfur or rotten egg odor, we recommend:

  • Shutting off your gas supply.
  • Opening windows.
  • Leaving your home right away.
  • Contacting your gas company immediately.

3. Air Conditioner Smells Musty

People who reach us about this issue frequently report their air conditioner smells like feet, dirty socks or a locker room when it runs. Also known as dirty sock syndrome, this smell is typically created by a grubby evaporator coil that has mold, mildew and bacteria buildup. Excess water can also make your home air conditioner smell bad. Dirty sock syndrome is most typical in climates where you use heating at night and during the morning before turning on cooling later in the day.

How to Solve It

The best way to prevent dirty sock syndrome is to regularly get a new air filter and schedule yearly air conditioning maintenance with Rapids Sheet Metal Works Inc. We’ll keep the evaporator coil clean and the drainage system flowing, as standing water can also result in unpleasant odors.

4. Air Conditioner Smells Like Vinegar

If you are experiencing air conditioner mildew smell or a strong, vinegar-like odor, it can be the result of several issues, including:

  • A filthy filter
  • Excess condensation
  • Blocked condensate pan or drain line
  • Moldy air conditioner or ductwork

How to Solve It

Check your filter first. If you haven’t replaced it within the last three months and can’t see light through it, you should replace it. If that doesn’t solve the smell, reach Rapids Sheet Metal Works Inc at 715-301-0256.

5. Air Conditioner Smells Like Burning Plastic

If you’re dealing with an air conditioner burning smell or that your air conditioner smells like fish, there could be a couple of things wrong. These include:

  • Broken capacitator that’s overheating the motor.
  • Motor that should have lubrication.
  • Broken fan belt.
  • Electrical malfunctions.

Electrical problems should be examined immediately to stop a fire. If you notice burning plastic when your air conditioner is operating, switch it off and call us at 715-301-0256 immediately.

6. Air Conditioner Smells Like Cat Pee

A powerful ammonia odor means there could be mold flourishing within your air conditioner or ductwork. The smell isn’t the mold itself, but the mycotoxins that mold makes.

How to Solve It

Mycotoxins are hazardous to your well-being. That’s why we recommend having a professional like Rapids Sheet Metal Works Inc look at your air conditioner and ductwork and clean it when necessary.

Our Pros Can Take Care of Weird Air Conditioner Smells Rapidly

You deserve to be cozy in your residence and shouldn’t have an air conditioner that smells bad. When you are seeking relief from your smelly air conditioner, reach us at 715-301-0256. We’ll figure out the trouble quickly and resolve it at a competitive.