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Reasons Your AC Might Leak
Posted On: March 18, 2024
An air conditioning (AC) unit leaking water can be a sign of various issues. Here are some common reasons why your AC unit might be leaking:
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Clogged Drain Line: Over time, algae, mold, and debris can accumulate in the drain line, causing it to become clogged. When this happens, water can back up into the unit and leak out.
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Dirty Air Filter: A dirty or clogged air filter can restrict airflow over the evaporator coils, causing them to freeze and eventually thaw, leading to excess water that may leak from the unit.
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Frozen Evaporator Coils: If the refrigerant levels are low or if there is restricted airflow, the evaporator coils can freeze. When the ice melts, it can overwhelm the drain pan and lead to leaking.
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Cracked or Damaged Drain Pan: The drain pan underneath the evaporator coils can crack or become damaged over time, causing water to leak out of the unit.
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Improper Installation: If the AC unit was not installed correctly, it may not be level. This can cause water to pool in certain areas and eventually leak out.
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Blocked Condensate Line: The condensate line that carries water away from the unit can become blocked by debris or algae growth, causing water to back up and leak out.
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Refrigerant Leak: A refrigerant leak can cause the evaporator coils to freeze, leading to excess water leakage when the ice thaws.
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Dirty Coils: Dust and dirt buildup on the evaporator or condenser coils can insulate them, preventing proper heat exchange and leading to freezing and subsequent leaking when they thaw.
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Over-sized Unit: If your AC unit is too large for the space it's cooling, it may cycle on and off frequently, leading to excess condensation and potential leakage.
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Broken Pump: If your AC unit has a condensate pump to remove water, it could malfunction or break, causing water to back up and leak from the unit.
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High Humidity: In extremely humid conditions, your AC unit may produce more condensation than usual, potentially overwhelming the drainage system and causing leaks.
Regular maintenance and inspection of your AC unit can help prevent many of these issues. If you notice water leaking from your AC unit, it's essential to address the problem promptly to prevent further damage to your system and your home.
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See What Our Customers Are Saying:
Aug 8, 2025
We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.
Aug 8, 2025
Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!
Feb 18, 2025
Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.
Feb 18, 2025
We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!
Feb 18, 2025
TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!
Feb 18, 2025
Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!
Feb 18, 2025
Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.
Aug 17, 2024
I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. Ive used the company in the past for my furnace so I was happy when I recognized Greg at my front door. Hes great and the service is always top notch. Id highly recommend using twintech for honest, superior service in the Durham region. Thanks!
Aug 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Aug 12, 2024
Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!
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