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

April 21, 2021

When your air conditioner is fresh and working properly, you shouldn’t be smelling anything weird. Unexpected air conditioner noises and odd smells are a sign that something is up. If your air conditioner is old or you haven’t had maintenance scheduled lately, they can be a sure sign you need pro air conditioning repair in Libertyville.

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 odor, isn’t a positive sign. You might also notice your:

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

These sweet, chemical scents are frequently a clue that your air conditioner is suffering from a refrigerant leak. Your system relies on this gas to shift heat through copper coils, which can crack as time passes.

4 Signs You Are Experiencing a Refrigerant Leak

Besides 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 on.
  2. Ice crystals on refrigerant lines or the evaporator coil.
  3. It’s hard keeping your home cold or having your desired temperature.
  4. Higher energy bills.

How You Can Take Care of It

A refrigerant leak needs professional support from a heating and cooling company like TopTec Heating, Cooling, Plumbing & Electrical. Your cooling technician will pinpoint and fix the leak before recharging your AC with refrigerant.

Resolving a refrigerant leak usually costs between $225 and $1,600, according to nationwide averages compiled by HomeAdvisor. Your precise cost will depend on the location and severity of the leak, as well as how much time it needs to repair.

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 produced because of its harmful effects on the ozone layer. Due to this, repairs can be extremely 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 likely nothing wrong with it. But there’s a significant probability you have a natural gas leak in your home. Natural gas has a sulfur-like additive to alert you when there’s a leak, because the gas can be deadly in big amounts.

How You Can Fix It

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

  • Switching off your gas supply.
  • Opening windows.
  • Evacuating your home as soon as possible.
  • Getting in touch with your gas company now.

3. Air Conditioner Smells Musty

People who reach us regarding this problem usually share 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 typically created by a dirty evaporator coil that has mold, mildew and bacteria buildup. Condensation can also make your home air conditioner smell bad. Dirty sock syndrome is most common in locations where you turn on heating at night and during the morning before turning on cooling later on.

How to Fix It

The best approach for preventing dirty sock syndrome is to frequently change your air filter and schedule yearly air conditioning maintenance with TopTec Heating, Cooling, Plumbing & Electrical. We’ll keep the evaporator coil clean and the drainage system flowing, since stagnant water can also result in nasty odors.

4. Air Conditioner Smells Like Vinegar

If you are dealing with air conditioner mildew smell or a strong, vinegar-like odor, it might be prompted by several situations, including:

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

How to Resolve It

Examine your filter first. If you haven’t replaced it within the last three months and can’t see light through it, it’s time to replace it. If that doesn’t fix the problem, contact TopTec Heating, Cooling, Plumbing & Electrical at 847-362-0262.

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 a couple of things wrong. These entail:

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

Electrical problems should be inspected right away to avoid a fire. If you notice burning plastic when your air conditioner is on, switch it off and call us at 847-362-0262 immediately.

6. Air Conditioner Smells Like Cat Pee

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

How to Repair It

Mycotoxins are hazardous to your well-being. That’s why you should have a specialist like TopTec Heating, Cooling, Plumbing & Electrical look at your air conditioner and ductwork and clean it when necessary.

Our Professionals Can Take Care of Unpleasant Air Conditioner Smells Rapidly

You deserve to be comfortable in your home and shouldn’t have an air conditioner that smells bad. When you are looking for relief from your smelly air conditioner, reach us at 847-362-0262. We’ll figure out the issue quickly and resolve it at a competitive.