6 Common Air Conditioner Smells Explained and How to Fix Them

April 21, 2021

When your air conditioner is clean and running properly, you shouldn’t be smelling anything odd. Abnormal air conditioner noises and odd smells are a sign that something is up. If your air conditioner is aging or you haven’t had maintenance done lately, they can be a clear sign you need pro air conditioning repair in Arlington.

Here are six of the top air conditioner smells and how you can solve 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 observe your:

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

These sweet, chemical smells are regularly a clue that your air conditioner has a refrigerant leak. Your system relies on this gas to transfer heat through copper coils, which can crack over time.

4 Hints You Have a Refrigerant Leak

In addition to the strange smell, here are four other signs that you have 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. Trouble keeping your house cold or having your desired temperature.
  4. High electrical costs.

How You Can Fix It

A refrigerant leak calls for experienced assistance from a heating and cooling company like Service Max Heating & Air Conditioning. Your cooling technician will locate and repair the leak before recharging your air conditioner with refrigerant.

Resolving a refrigerant leak typically costs between $225 and $1,600, per nationwide averages compiled by HomeAdvisor. Your precise cost will depend on the location and severity of the leak, as well as how long it needs to fix.

If your air conditioner was installed early than 2010, there’s a high probability it runs on R-22 or Freon refrigerant. This refrigerant is no longer being made because of its adverse effects on the ozone layer. Because of this, repairs can be significantly expensive so it may be wisest to consider air conditioning installation in this circumstance.

2. Air Conditioner Smells Like Gas

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

How You Can Repair It

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

  • Switching off your gas supply.
  • Opening windows.
  • Going outside as soon as possible.
  • Getting in touch with your gas company without delay.

3. Air Conditioner Smells Musty

People who call us regarding this situation usually mention their air conditioner smells like feet, dirty socks or a locker room when it runs. Also known as dirty sock syndrome, this smell is often linked to a dirty 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 often seen in climates where you need heating at night and during the morning before turning on cooling during the afternoon.

How to Fix It

The best method for preventing dirty sock syndrome is to frequently change your air filter and schedule routine air conditioning maintenance with Service Max Heating & Air Conditioning. We’ll keep the evaporator coil clean and the drainage system unclogged, as stagnant water can also create noxious odors.

4. Air Conditioner Smells Like Vinegar

If you are dealing with air conditioner mildew smell or an acidic, vinegar-like odor, it might be the result of several issues, such as:

  • A clogged filter
  • Extra condensation
  • Blocked condensate pan or drain line
  • Moldy air conditioner or ductwork

How to Fix It

Inspect your filter first. If you haven’t changed it within the last three months and can’t see light through it, it’s time to replace it. If that doesn’t solve the issue, call Service Max Heating & Air Conditioning at 360-255-5857.

5. Air Conditioner Smells Like Burning Plastic

If you’re noticing an air conditioner burning smell or that your air conditioner smells like fish, there could be several things wrong. These involve:

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

Electrical issues should be examined immediately to prevent a fire. If you notice burning plastic when your air conditioner is operating, switch it off and contact us at 360-255-5857 without delay.

6. Air Conditioner Smells Like Cat Pee

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

How to Fix It

Mycotoxins are hazardous to your well-being. That’s why you should have a professional like Service Max Heating & Air Conditioning examine your air conditioner and ductwork and clean it when recommended.

Our Professionals Can Take Care of Strange Air Conditioner Smells Fast

You deserve to be comfortable in your residence and shouldn’t have an air conditioner that smells bad. When you need relief from your smelly air conditioner, reach us at 360-255-5857. We’ll determine the trouble quickly and resolve it at a fair price.