6 Common Air Conditioner Smells Explained and How to Solve the Issue

April 21, 2021

When your air conditioner is spotless and running right, it’s not normal to be smelling anything weird. Out of the ordinary air conditioner noises and odd smells are a sign that something is up. If your air conditioner is past its prime or you haven’t had a tune-up done within the last year, they can be a sure sign you need pro air conditioning repair in Bartlesville.

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, specifically a chemical smell, isn’t a good sign. You could also observe your:

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

These sweet, chemical smells are typically a hint that your air conditioner is suffering from a refrigerant leak. Your system needs this gas to transfer heat through copper coils, which can break out as time goes on.

4 Hints You Are Dealing with a Refrigerant Leak

In addition to the strange smell, here are four other clues 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 cool or reaching your programmed temperature.
  4. High energy expenses.

How You Can Fix It

A refrigerant leak needs professional repairs from a heating and cooling company like Farris Heating & Air. Your cooling technician will locate and fix the leak before recharging your air conditioner with refrigerant.

Repairing a refrigerant leak often costs between $225 and $1,600, per nationwide averages compiled by HomeAdvisor. Your exact cost will depend on the location and severity of the leak, as well as how many hours it takes to repair.

If your air conditioner was installed early than 2010, it’s likely it uses R-22 or Freon refrigerant. This refrigerant is no longer being made due to its negative effects on the ozone layer. Because of this, repairs can be extremely expensive so it may be wisest to schedule air conditioning installation in this situation.

2. Air Conditioner Smells Like Gas

If your air conditioner smells like rotten eggs, there’s possibly nothing wrong with it. But there’s a high chance 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 big amounts.

How You Can Repair It

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

  • Switching off your gas supply.
  • Opening windows.
  • Going outside right away.
  • Getting in touch with your gas company without delay.

3. Air Conditioner Smells Musty

Homeowners who contact us about this problem usually share their air conditioner smells like feet, dirty socks or a locker room when it runs. Also referred to as dirty sock syndrome, this smell is typically caused by a dirty evaporator coil that has mold, mildew and bacteria buildup. Moisture can also make your home air conditioner smell bad. Dirty sock syndrome is most typical in locations where you turn on heating at night and during the morning before turning on cooling during the afternoon.

How to Repair It

The best method for preventing dirty sock syndrome is to routinely replace your air filter and schedule annual air conditioning maintenance with Farris Heating & Air. We’ll keep the evaporator coil clean and the drainage system unclogged, because stagnant water can also lead to unpleasant odors.

4. Air Conditioner Smells Like Vinegar

If you are dealing with air conditioner mildew smell or a pungent, vinegar-like odor, it might be prompted by several issues, such as:

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

How to Resolve It

Check your filter first. If you haven’t put in a new one within the last three months and can’t see light through it, you should replace it. If that doesn’t fix the smell, contact Farris Heating & Air at 918-333-0376.

5. Air Conditioner Smells Like Burning Plastic

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

  • Broken capacitator that’s overheating the motor.
  • Motor that needs lubrication.
  • Broken fan belt.
  • Electrical problem.

Electrical issues should be checked right away to prevent a fire. If you smell burning plastic when your air conditioner is running, switch it off and call us at 918-333-0376 immediately.

6. Air Conditioner Smells Like Cat Pee

A strong ammonia odor means there might be mold present 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 wellness. That’s why it’s important to have a professional like Farris Heating & Air check your air conditioner and ductwork and clean it when recommended.

Our Professionals Can Take Care of Unpleasant Air Conditioner Smells Fast

You deserve to be comfortable in your residence and shouldn’t have an air conditioner that smells bad. When you are seeking relief from your noxious air conditioner, reach us at 918-333-0376. We’ll diagnose the problem quickly and fix it at a fair price.