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

April 21, 2021

When your air conditioner is clean and operating right, you shouldn’t be smelling anything odd. Unexpected air conditioner noises and weird smells are a hint that something is up. If your air conditioner is getting older or you haven’t had maintenance completed within the last year, they can be an obvious sign you need skilled air conditioning repair in Erie.

Here are six of the most common 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, specifically a chemical smell, isn’t a positive sign. You might also report your:

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

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

4 Hints You Are Dealing with a Refrigerant Leak

In addition to the odd smell, here are four other signs that you are dealing with a refrigerant leak.

  1. Bubbling or hissing sounds when your air conditioner is cooling.
  2. Ice on refrigerant lines or the evaporator coil.
  3. Difficulty keeping your home cold or having your set temperature.
  4. Higher electrical costs.

How You Can Fix It

A refrigerant leak requires experienced support from a heating and cooling company like Patterson & Stirling Inc. Your cooling pro will locate and fix the leak before recharging your AC with refrigerant.

Fixing 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 many hours it needs to fix.

If your air conditioner was installed early than 2010, there’s a good chance it has R-22 or Freon refrigerant. This refrigerant is no longer being manufactured as a result of its harmful effects on the ozone layer. As a result, repairs can be extremely expensive so it may be smartest to consider air conditioning installation in this situation.

2. Air Conditioner Smells Like Gas

If your air conditioner smells like rotten eggs, there’s probably nothing wrong with it. But there’s a significant chance you have a natural gas leak in your house. Natural gas has a sulfur-like additive to alert you when there’s a leak, since the gas can be fatal in large amounts.

How You Can Fix It

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

  • Switching off your gas supply.
  • Opening windows.
  • Leaving your home right away.
  • Contacting your gas company immediately.

3. Air Conditioner Smells Musty

People who call us about this problem frequently share 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 created 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 typical in climates where you use 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 frequently replace your air filter and schedule routine air conditioning maintenance with Patterson & Stirling Inc. We’ll keep the evaporator coil clean and the drainage system unblocked, since standing water can also result in unpleasant odors.

4. Air Conditioner Smells Like Vinegar

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

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

How to Resolve It

Check your filter first. If you haven’t replaced it within the last three months and can’t see light through it, we recommend replacing it. If that doesn’t fix the smell, contact Patterson & Stirling Inc at 814-308-0416.

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 number of things wrong. These entail:

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

Electrical issues should be inspected quickly to stop a fire. If you detect burning plastic when your air conditioner is running, turn it off and contact us at 814-308-0416 immediately.

6. Air Conditioner Smells Like Cat Pee

An overpowering ammonia odor means there may be mold growing within your air conditioner or ductwork. The smell isn’t the mold itself, but the mycotoxins that mold creates.

How to Fix It

Mycotoxins are hazardous to your well-being. That’s why you should have a pro like Patterson & Stirling Inc check your air conditioner and ductwork and clean it when needed.

Our Professionals Can Eliminate Odd Air Conditioner Smells Quickly

You deserve to be comfortable in your house and shouldn’t have an air conditioner that smells bad. When you are looking for relief from your stinky air conditioner, give us a call at 814-308-0416. We’ll diagnose the issue quickly and take care of it at a reasonable.