Skip to main content

Do you ever get hit with a funky smell every time you turn on your air conditioner? It’s not exactly the refreshing breeze you were hoping for. A stinky AC can put a damper on even the nicest of days, but don’t worry – we’ve got some solutions for you!

In this article, Orzech Heating & Cooling will walk you through what causes bad smells in air conditioners and share some helpful tips to get rid of them.

Let’s dive right in!

How to Get Rid Of Bad Smell From Air Conditioiner

Why is a bad smell coming from your air conditioner?

There are several reasons why your air conditioner may produce a foul odour. One of the main culprits is mould and mildew growth inside the unit. This can occur when moisture builds up in areas such as the evaporator coil or drip pan, creating an ideal breeding ground for bacteria.

Another common cause of bad smells is dirty filters. As air passes through the filter, it traps dust, dirt, and other particles that can accumulate over time. When not cleaned or replaced regularly, these contaminants can lead to unpleasant odours circulating throughout your home.

Sometimes, pets also contribute to AC stinkiness by leaving behind hair or urine in hard-to-reach places like vents and ducts. In addition, airborne pollutants such as cigarette smoke and cooking fumes can also get trapped in your air conditioning system causing nasty smells.

It’s important to identify the source of the smell before attempting any solutions; otherwise, you might be treating just a symptom instead of curing what causes bad odour from your AC unit.

Try these tips to get rid of the stink!

If you’re dealing with a bad smell coming from your air conditioner, don’t worry – there are some tips you can try to get rid of it.

1. Replace your air filter

One of the first things you can do is clean or replace your air filter. Over time, dust and debris can accumulate in the filter, causing unpleasant odours. By cleaning or replacing it regularly, you’ll prevent this buildup.

2. Check for mould or mildew

Another tip is to check for any mould or mildew growth in your AC unit. These fungi thrive in dark and moist environments, so if your AC isn’t properly ventilated, they might start growing inside it. To remove them, consider using a mixture of water and vinegar or bleach.

3. Use an odour absorber

You can also use an odour absorber like activated charcoal to help eliminate smells from your AC system. Simply place it near the intake vents and let it absorb any unwanted odours.

4. Regular maintenance

Make sure to have regular maintenance performed on your air conditioning system by a professional technician. They’ll be able to identify any potential issues that could cause bad smells before they become a bigger problem.

By following these simple tips, you should be able to banish those unpleasant odours from your home’s air conditioning system!

a ductless ac running in a windowless room

How to prevent bad smells in your air conditioner

One of the best ways to prevent bad smells in your air conditioner is by regularly cleaning and maintaining it. Make sure to clean or replace the filter every month, as a clogged filter can create musty odours.

Another way to prevent bad smells is by keeping your unit dry. Excess moisture can lead to mould growth, which produces unpleasant scents. You can use a dehumidifier or turn on the fan mode for a few hours after using your AC to help keep it dry.

Additionally, consider adding an air purifier or using natural odour absorbers such as activated charcoal or vinegar near your unit. These will help eliminate any lingering smells in the air.

Be mindful of what you’re putting into your AC system. Avoid using harsh chemicals and always follow manufacturer recommendations when cleaning or servicing your unit.

By following these tips, you’ll be able to keep bad smells at bay and enjoy fresh, clean air from your AC all year round!


After following the tips mentioned above, you should be able to enjoy fresh and clean air from your air conditioner. Remember that regular maintenance of your unit is crucial in preventing bad smells from developing in the first place. By keeping your filters clean, checking for leaks or mould growth, and scheduling professional cleaning services when necessary, you can avoid unpleasant odours and ensure that your air conditioner runs efficiently.

In addition to improving indoor air quality, taking care of your AC system can also help prolong its lifespan and save you money on AC repairs down the line. So don’t neglect this important aspect of home maintenance – a little effort now can go a long way toward ensuring comfortable living conditions for years to come.