Why is My Air Filter Wet?

If you go to replace your air filter and find that it is wet, you may be wondering what is going on. This is a common issue, but it does indicate a problem. At Blind & Sons, we want you to know what to do to protect your furnace from all potential problems, so here is a closer look at what a wet furnace filter could mean.

Common Causes of a Wet Air Filter

First, if you notice that your furnace’s air filter is wet, make sure you replace it immediately. A wet filter is a perfect place for mold and mildew growth, and you want to address this before it becomes a problem. However, you also need to find the cause.

Your HVAC air filter is part of both the cooling and heating systems. Wetness is more common when running the AC because the air conditioning system creates condensation that can get caught in the lines. Here are three reasons you might experience a wet air filter.

1. Frozen Evaporator Coil

If the furnace is wet during the cooling season and you’re noticing water around the indoor air conditioning unit, combined with warm air from the vents, you may have a frozen evaporator coil. This often happens when refrigerant levels get low, or there is a clog somewhere along the line. Check the lines outside to see if there is any ice buildup. If there is, call for a service check.

2. Clogged Condensate Drain

When you run the AC, condensation naturally occurs. The condensate drain allows that to flow out of the system and out of your home. If you have a clog in the condensate drain, then the water will get stuck in the system and make your air filter wet.

Try to suck out any clogs from the condensate drain using a shop vac if you suspect this problem. If that does not work, you will need a technician to reach the clog using specialized tools. Do not try to use a snake on the condensate drain, as you may damage it.

3. Leaking Drain Pan

If the drain pan in the condensation system is leaking, it can allow moisture to get to the air filter. This problem can occur as the system gets older and the drain pan develops a crack or rust. Replacing the drain pan will resolve this issue.

Get Professional Help for Your Wet Air Filter

Some of these problems you can fix on your own, but sometimes you will need professional help to get to the root of the issue. If you don’t find an obvious problem with your drain pan, condensate drain, or evaporator coil, or if you don’t feel confident repairing these issues, get professional help. Blind & Sons is just a phone call away, ready to help with a team of professional HVAC technicians standing by.

Contact Blind & Sons at (330) 753-7711 or reach out online to learn more about our air conditioning and heating system services or schedule service for your HVAC system.

Schedule Service


“Blind & Sons did a beautiful job at a fair price installing duct work to our second floor bedroom during our kitchen remodel. We tore out a kitche...” David T.
“Very thorough and professional! Raymond was knowledgeable represented Blind and Sons exceptionally well! I will do business with this company again.” Anthony W.
“Professional, courteous. We had a really old furnace in the new house we bought that took the guys quite a bit of time and effort to remove. Extremely...” Lindsey B.
Why Choose
Blind & Sons?
24/7 HVAC & Plumbing Emergency Service
Satisfaction Guarantee
Schedule Service Online
Referral Club
MVP Program Savings
Get cozy with extra savings
Get 24 Months No-Interest Financing PLUS $2,500 Instant Rebate Any High-Efficiency Furnace AND A/C System**
Expires 09/30/2021
Get $2,000 OFF* off Any Generator! Special Financing Available.
Expires 12/31/2021
ONLY $29* Replace any Switch or Outlet!
Expires 12/31/2021
ONLY $59** A/C or Furnace Tune-Up
Expires 09/30/2021
Emporia offer
Expires 12/31/2021
$100 OFF* Duct Cleaning!
Expires 09/30/2021
FREE* Service Call with Repair
Expires 09/30/2021
Price Match Plus Guarantee
Expires 12/31/2021
Serving Our
Northeast Ohio
We are committed to bringing our
community fast, affordable home
comfort solutions.