6 Common Air Conditioner Smells Explained and How to Fix the Problem

April 21, 2021

When your air conditioner is clean and working properly, it’s not normal to be smelling anything odd. Unexpected air conditioner noises and strange smells are a clue that something is out of whack. If your air conditioner is getting older or you haven’t had service done recently, they can be a clear sign you need professional air conditioning repair in Troy.

Here are six of the top air conditioner smells and how you can repair them.

1. Central Air Conditioner Smells Like Chemicals

If your air conditioner smells bad when turned on, especially a chemical smell, isn’t a positive sign. You might also observe your:

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

These sweet, chemical smells are often a clue that your air conditioner has a refrigerant leak. Your system needs this gas to transfer heat through copper coils, which can crack as time passes.

4 Signs You Are Experiencing a Refrigerant Leak

In addition to the weird smell, here are four other clues that you have a refrigerant leak.

  1. Bubbling or hissing sounds when your air conditioner is operating.
  2. Ice on refrigerant lines or the evaporator coil.
  3. Difficulty keeping your residence comfortable or having your set temperature.
  4. Higher electrical expenses.

How You Can Take Care of It

A refrigerant leak requires professional assistance from a heating and cooling company like Edington Heating & Cooling Inc. Your cooling professional will find and mend the leak before recharging your system with refrigerant.

Resolving 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 much time it takes to fix.

If your air conditioner was installed early than 2010, there’s a high probability it has R-22 or Freon refrigerant. This refrigerant is no longer being manufactured because of its negative effects on the ozone layer. Due to this, repairs can be very expensive so it may be best to do air conditioning installation in this instance.

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 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, as the gas can be toxic in heavy concentrations.

How You Can Fix It

If you smell a sulfur or rotten egg odor, we suggest:

  • Switching off your gas supply.
  • Opening windows.
  • Evacuating your home right away.
  • Contacting your gas company without delay.

3. Air Conditioner Smells Musty

Homeowners who contact us about this situation usually say their air conditioner smells like feet, dirty socks or a locker room when it’s running. Also called dirty sock syndrome, this smell is typically caused by a filthy evaporator coil that has mold, mildew and bacteria buildup. Moisture can also make your home air conditioner smell bad. Dirty sock syndrome is most often seen in areas where you need heating at night and during the morning before transitioning to cooling later on.

How to Repair It

The best method for preventing dirty sock syndrome is to routinely change your air filter and schedule routine air conditioning maintenance with Edington Heating & Cooling Inc. We’ll keep the evaporator coil clean and the drainage system unclogged, as excess water can also produce unpleasant odors.

4. Air Conditioner Smells Like Vinegar

If you are living with air conditioner mildew smell or a strong, vinegar-like odor, it might be the result of several problems, like:

  • A dirty filter
  • Excess condensation
  • Plugged condensate pan or drain line
  • Moldy air conditioner or ductwork

How to Resolve It

Inspect your filter first. If you haven’t changed it within the last three months and can’t see light through it, we recommend replacing it. If that doesn’t fix the issue, call Edington Heating & Cooling Inc at 937-558-9478.

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 several things wrong. These include:

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

Electrical issues should be checked immediately to stop a fire. If you smell burning plastic when your air conditioner is running, turn it off and contact us at 937-558-9478 without delay.

6. Air Conditioner Smells Like Cat Pee

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

How to Solve It

Mycotoxins are hazardous to your health. That’s why you should have a specialist like Edington Heating & Cooling Inc look at your air conditioner and ductwork and clean it when necessary.

Our Specialists Can Get Rid of Unpleasant Air Conditioner Smells Fast

You deserve to be cozy in your house and shouldn’t have an air conditioner that smells bad. When you are looking for relief from your smelly air conditioner, reach us at 937-558-9478. We’ll figure out the problem quickly and take care of it at a fair price.