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What to Do if Your Air Conditioner Unit Is Leaking

condensation on air conditioner

Modern air conditioning systems are subject to indoor and outdoor water leaks. Excess water can lead to mould and mildew and may even cause structural damage to your home. Here's a brief guide to help you spot and correct any AC leakage problems.

Common Causes of Water Leakage

Whether the leak occurs in the outdoor or indoor unit, it signals an issue with the overall functioning of your AC system. Here are some common causes of water leaks.

  • Blocked or broken condensate drain line. Leaks are frequently caused by debris blocking the condensate drain line. If you have a wet/dry vac, you can try eliminating the clog on your own. If the drain line is damaged, you have to repair or replace it.

  • Drain pan damage. The drain pan catches dripping condensation and directs the water into the drain line. Advanced age and frequent use will naturally lead to rust and corrosion, which can cause leaking. If your AC system is 15 years old, you should expect this type of problem.

  • Freezing evaporator coils. If your air conditioner has a dirty filter or insufficient refrigerant, ice can build up around the evaporator coil on the indoor unit. The resulting water runoff may be too much for the drain line’s capacity.

  • Excess condensation. Condensation is a normal part of your air conditioner’s function. However, the resulting water can back up if your air ducts aren't properly insulated or if you're experiencing a season of higher-than-usual humidity.

You may be able to continue running your air conditioning unit while it leaks, but it may not cool your home as well as it should. Quick, decisive action is the best way to ensure your AC isn’t wasting energy.

Troubleshooting Steps You Can Try

When you spot a leak, there are a few steps you can take immediately to minimize harm.

  • Turn off the air conditioner so that it's safe to investigate

  • Wipe up the water before it causes damage

  • Check the air filter and replace it if it's dirty

  • Check to ensure your AC unit has sufficient refrigerant and top up if necessary

  • Inspect the drain pan and drain pipe for any accumulation of debris

Don't delay calling in a professional to ensure you catch any major issues and ensure your air conditioner runs at peak efficiency.

Air Conditioner Maintenance and Repair in the GTA

If you're concerned about excess water leaking from your AC system, you can count on the Black Forest Plumbing team for reliable, affordable service. We’re a trusted source for AC repair, maintenance and replacement, serving homes in businesses in the GTA since 2009. Contact us today to schedule your AC repair.


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