6 Common Air Conditioner Smells Answered and How to Fix the Issue

April 21, 2021

When your air conditioner is fresh and operating properly, it’s expected you won’t be smelling anything odd. Unusual air conditioner noises and weird smells are a hint that something is wrong. If your air conditioner is getting older or you haven’t had service completed recently, they can be an obvious sign you need pro air conditioning repair in Mechanicsburg.

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 may also report your:

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

These sweet, chemical smells are often a hint that your air conditioner is experiencing a refrigerant leak. Your system needs this gas to shift heat through copper coils, which can wear out as time goes on.

4 Clues You Have a Refrigerant Leak

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

  1. Bubbling or hissing sounds when your air conditioner is on.
  2. Frost on refrigerant lines or the evaporator coil.
  3. It’s hard keeping your house cool or achieving your desired temperature.
  4. Higher energy costs.

How You Can Take Care of It

A refrigerant leak needs experienced support from a heating and cooling company like H & H Service Company. Your cooling technician will find and mend the leak before recharging your system with refrigerant.

Fixing a refrigerant leak often costs between $225 and $1,600, based on 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 needs to fix.

If your air conditioner was installed prior to 2010, it’s likely it runs on R-22 or Freon refrigerant. This refrigerant is no longer being manufactured as a result of its negative effects on the ozone layer. Consequently, repairs can be significantly expensive so it may be smartest to schedule air conditioning installation in this situation.

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 chance you have a natural gas leak in your home. Natural gas has a sulfur-like additive to signal you when there’s a leak, as the gas can be fatal in large amounts.

How You Can Solve It

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

  • Shutting 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 call us regarding this issue often report their air conditioner smells like feet, dirty socks or a locker room when it’s on. Also referred to as dirty sock syndrome, this smell is usually caused by 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 turn on heating at night and during the morning before turning on cooling during the afternoon.

How to Fix It

The best approach for preventing dirty sock syndrome is to regularly change your air filter and schedule routine air conditioning maintenance with H & H Service Company. We’ll keep the evaporator coil clean and the drainage system flowing, because excess water can also create unpleasant odors.

4. Air Conditioner Smells Like Vinegar

If you are living with air conditioner mildew smell or an acidic, vinegar-like odor, it might be caused by several problems, such as:

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

How to Resolve It

Examine 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 resolve the smell, contact H & H Service Company at 717-220-4502.

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 a couple of things wrong. These entail:

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

Electrical problems should be inspected immediately to avoid a fire. If you detect burning plastic when your air conditioner is running, shut it off and contact us at 717-220-4502 right away.

6. Air Conditioner Smells Like Cat Pee

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

How to Solve It

Mycotoxins are hazardous to your well-being. That’s why we recommend having a professional like H & H Service Company examine your air conditioner and ductwork and clean it when necessary.

Our Pros Can Take Care of Unpleasant Air Conditioner Smells Quickly

You deserve to be comfortable in your home and shouldn’t have an air conditioner that smells bad. When you are seeking relief from your stinky air conditioner, reach us at 717-220-4502. We’ll figure out the problem quickly and fix it at a fair price.