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

April 21, 2021

When your air conditioner is clean and running correctly, you shouldn’t be smelling anything weird. Unusual air conditioner noises and strange smells are a clue that something is wrong. If your air conditioner is aging or you haven’t had a tune-up scheduled lately, they can be a sure sign you need pro air conditioning repair in Phoenix.

Here are six of the most frequent 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, particularly a chemical scent, isn’t a great 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 needs this gas to transfer heat through copper coils, which can wear out as time passes.

4 Hints You Have a Refrigerant Leak

Besides the odd smell, here are four other hints that you have a refrigerant leak.

  1. Bubbling or hissing sounds when your air conditioner is cooling.
  2. Frost on refrigerant lines or the evaporator coil.
  3. Difficulty keeping your home cold or achieving your programmed temperature.
  4. Higher utility bills.

How You Can Fix It

A refrigerant leak requires skilled repairs from a heating and cooling company like Integrity AC & Heating LLC. Your cooling specialist will pinpoint and fix the leak before recharging your AC with refrigerant.

Resolving a refrigerant leak typically costs between $225 and $1,600, according to 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 takes to solve.

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 made as a result 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 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 likelihood you have a natural gas leak in your residence. Natural gas has a sulfur-like additive to signal you when there’s a leak, because the gas can be deadly in heavy concentrations.

How You Can Fix It

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

  • Switching off your gas supply.
  • Opening windows.
  • Going outside promptly.
  • Contacting your gas company now.

3. Air Conditioner Smells Musty

Individuals who contact us about this situation often 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 frequently linked to 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 common in climates where you use heating at night and during the morning before turning on cooling during the afternoon.

How to Fix It

The best method for preventing dirty sock syndrome is to frequently replace your air filter and schedule regular air conditioning maintenance with Integrity AC & Heating LLC. We’ll keep the evaporator coil clean and the drainage system unclogged, because excess water can also produce noxious odors.

4. Air Conditioner Smells Like Vinegar

If you are experiencing air conditioner mildew smell or an acidic, vinegar-like odor, it could be prompted by several problems, such as:

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

How to Solve 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, it’s time to replace it. If that doesn’t fix the issue, reach Integrity AC & Heating LLC at 602-971-0567.

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 involve:

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

Electrical problems should be inspected quickly to avoid a fire. If you notice burning plastic when your air conditioner is on, switch it off and reach us at 602-971-0567 immediately.

6. Air Conditioner Smells Like Cat Pee

An overpowering ammonia odor means there could be mold flourishing within 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 health. That’s why it’s important to have a professional like Integrity AC & Heating LLC check your air conditioner and ductwork and clean it when recommended.

Our Specialists Can Take Care of Weird Air Conditioner Smells Rapidly

You deserve to be cozy in your residence and shouldn’t have an air conditioner that smells bad. When you are looking for relief from your smelly air conditioner, contact us at 602-971-0567. We’ll determine the trouble quickly and fix it at a competitive.