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How to Stop Water Leaking from Your HVAC Unit

fixing a water leak from hvac unit

Your HVAC system is an essential part of your home, especially during the hot summer months. It works tirelessly to keep your indoor environment cool and comfortable, but sometimes it can develop problems such as a water leak. A water leak from your HVAC unit can cause serious damage to your home if left unchecked (not to mention further damage to your AC unit). Luckily, there are simple and effective ways to prevent and stop water leakage from your HVAC unit.

Let's talk about some of the most common causes of HVAC water leaks and share tips on how to address them.

Clogged Condensate Drain:

One of the most common causes of HVAC water leaks is a clogged condensate drain. Over time, dirt, dust, and other debris can accumulate in the drain, causing it to clog. When this happens, the condensate water has nowhere to go and backs up into your HVAC system, causing it to leak.

To fix this issue, locate the condensate drain and use a wet/dry vac to remove any standing water. Then, use a pipe cleaning brush or a wire to clear the drain of any obstructions. A plumbing snake is also a really good tool for this.

Regularly cleaning your drains can help prevent this issue from occurring, which is why we always recommend people to plan for regular AC maintenance. As a part of your maintenance routine, you can also pour bleach down the drain line every few months to help prevent mold and mildew buildup.

Damaged or Rusty Drain Pan

Another common cause of HVAC leaks is a damaged or rusty drain pan. The drain pan is located underneath the evaporator coils and catches any condensate water that may leak. Over time, the drain pan can deteriorate due to rust and corrosion, causing it to develop holes and cracks.

To fix this issue, you will need to replace the drain pan. It is important to regularly inspect your drain pan for any signs of damage and replace it as needed. For cracks or leaks in your drain pan, you can use a water sealant.

checking for low refrigerant lines causing a water leak in ac unit

Low Refrigerant Levels

Low refrigerant levels can also cause your HVAC unit to leak water. When your HVAC system has low refrigerant levels, it can cause your evaporator coil to freeze up. When this happens, the ice on the coil can melt and overflow the drain pan, causing water leakage.

To fix this issue, you will need to call in a professional HVAC technician to recharge your refrigerant. This is not typically a job that you should attempt to DIY.

Dirty Air Filters

Dirty air filters can also contribute to HVAC water leaks. When your air filter is dirty or clogged, it can restrict airflow and cause your evaporator coils to freeze. When the ice melts, it can overflow the drain pan and cause leakage. Much like when your refrigerant levels are low.

To prevent this from happening, you should regularly change your air filters every three months, or more frequently if you have pets or allergies. This will help to ensure that your system is running efficiently and not restricted by a clogged air filter.

Improper Installation

Finally, improper installation can also cause your HVAC unit to leak water. If your HVAC system was not installed correctly, it can cause condensation and water buildup, leading to leaks. Which is why professional HVAC installation is so important. This may happen more frequently than some people may think. Often times people will attempt to DIY install or hire a "HVAC Company" that hasn't had proper training or certifications. Leaving you with an improperly installed HVAC unit.

To fix this issue, you will need to hire a professional HVAC technician for AC repairs. They'll evaluate your system and make any necessary repairs or adjustments. This is not a DIY project and should be done by only a team of HVAC professionals who have properly been trained and certified.

hvac professional fixing a water leak on an hvac system

Fixing Water Leaks From Your HVAC Unit

Your HVAC system is a critical part of your home, and it is important to keep it in good working condition to avoid any damage or issues. If you notice water leaking from your HVAC unit, it is important to address the issue promptly to prevent any further damage.

The most common causes of HVAC water leaks are clogged condensate drains, damaged drain pans, low refrigerant levels, dirty air filters, and improper installation. By following the tips outlined in this article, you can prevent and fix water leakage from your HVAC system and ensure that your home stays cool and comfortable all year round.

Remember, regular maintenance and inspections of your HVAC system can help to prevent water leaks from happening in the first place. So be sure to follow the recommended maintenance schedule for your unit. If you need any assistance with repairs or installations, don't hesitate to call us here at Thomas Service Company, your local Alabama HVAC company.