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.
If you notice your air filter is wet, this is an indication that there is an issue with your HVAC system that should be addressed as soon as possible. A wet air filter is not doing its job properly! Wet air filters result in less airflow and higher energy bills.
A wet filter means a clogged condensate line
The white PVC pipes (seen above) are the condensate drain lines that direct moisture outside. But sometimes, these lines can become clogged with dirt or algae. And when that happens, water will back up and eventually overflow.
A wet air filter can spread moisture throughout the ventilation and HVAC system into the rest of the home–and if the filter remains wet for very long, it'll be a breeding ground for mold and mildew that will also spread quickly. Before you know it, you'll be looking at a duct and system cleaning or worse!
Running the system with a wet filter can wreak terrible havoc. Wet filters do an extremely poor job at allowing for adequate airflow. Restricted airflow will cause your system to run inefficiently and as mentioned above can even cause the evaporator coils to freeze over.
After rinsing your filter, gently shake off excess water and allow the filter to dry naturally. Do not apply oil until the air filter is completely dry.
To unclog an AC drain line, turn off the power to the unit. Locate the drain line and use a wet/dry vacuum to suck out the clog. Flush the line with water using a garden hose or cup of water. Check and clean the drain pan under the indoor unit.
However, if the air filter gets soaked, that water starts to displace and close off all of the pathways that air takes through the filter and into the engine. This cuts the airflow and causes the engine to run rich. Or it can cause performance to drop off.
Well, most HEPA filters are made of fibers, and using water might damage the fibers which are responsible for trapping the tiny particles.
It's not recommended to use a hairdryer or any heat source to dry the HEPA filter. Allow the filter to air dry completely before reinstalling it to prevent damage to the filter fibers.
Without a filter, dirt and debris get sucked into your AC system and blown back into your home, staying and accumulating in your HVAC ductwork. Both scenarios can lower your air quality and potentially damage your HVAC system, resulting in costly repairs or replacements.
If your filter is wet for a long time, your engine may choke or run rich. This might eventually result in water getting inside your engine, where it could mix with the oil and make a big mess.
After rinsing, you will want to lightly shake the excess water out of your filter to allow it to dry quicker. While you can proceed to the next step after allowing the filter to dry for 30 minutes to an hour, for optimal results you should let your filter dry overnight if possible.
The contents inside the filter are rinsed with purified water before they are packed. Sometimes, this can cause condensation inside the bag/lid, which is harmless.
A wet air filter is usually one of the end products of a condensation leak. Moisture condensed into liquid form usually lands on the drip pan below the evaporator coil, which funnels the liquid towards a drain and away from the HVAC system.
Wash your HEPA filter with warm water and allow it to dry if your model specifically states that water cleaning is safe. You can also soak your filter in hot water if it is extremely dirty. Clean non-washable, permanent HEPA filters using a vacuum to remove dust and debris.
When operating equipment in wet weather conditions, it is common for excess moisture to be drawn into the air intake system. This is particularly common in on-highway equipment which often operates at high speed in very wet weather.
Unkempt air filters may negatively affect indoor air quality by spreading pet dander, dust, and other allergens throughout your home. This may lead to irritated eyes, nose, and potentially breathing problems.
All right, so in summary, don't use bleach; use vinegar. That helps with any mildew growth—keeps you running clean. It's not going to actually clean your A/C drain, but it can prevent some backups.