My Air Conditioner Smells Bad - How Do I Fix This

Two women smelling something funky from AC

Having an air conditioner that doesn’t operate properly is one thing, however, when your air conditioner is pushing out a bad smell, that can make you and your family’s living area very uncomfortable. There are several factors that can cause your AC to generate an odd odor. Here’s a list to evaluate where it could possibly be coming from.

Blocked Condensate Line

There’s a drain pan that holds water from your AC unit that includes what’s called a condensate line. This is typically a PVC pipe. Since this pipe is small and sits in an enclosed area created to hold water, this can produce bacterial growth, mildew, and sludge – and with that possible unpleasant smells and clogs can occur.


A Tune-up includes cleaning and clearing the condensate lines and helps ensure proper and continuous operation of the air conditioner. Give us a call to schedule your tune-up appointment now.

Replace the Air Filter

Can’t remember the last time you changed the air filter for your home’s air conditioner? That may also be the source of an odor dilemma. If the air filter isn’t changed on a regular basis (at least every 30-90 days) this can cause dirt and debris to grow upon the air filter itself, and that alone will bring out a not-so-nice and musty smell.


Change the air filter and try not to allow your filter to go past 3 months without changing it. If all else fails, just set a reminder (or a few) on your phone to make sure that you get this task done.

Your AC System is Too Big for Your Home

Not all air conditioners are created equal. If you happen to have a system that is too big for your home then this could cause your home to get colder quicker than it should, which may sound great, however, this could also cause excess moisture or humidity in your home.


Speak to your skilled HVAC techs here at Patrick's Heating & Air Conditioning. We can assist with finding the properly sized air conditioning system for your home and provide a free estimate on select HVAC, Plumbing and Electrical Services and Replacements!

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