Why Is My HVAC Leaking Water? (And How To Fix It)

HVAC units are typically so dependable that it’s surprising when there’s a malfunction. So, if you’re noticing water or excessive condensation under or near your HVAC unit, you are probably wondering, “Why is my HVAC leaking water?”

Issues with the condensate pipe or pump are the most common causes for a leaking HVAC system. Lesser common culprits include a clogged air filter, poorly insulated ductwork, or a boiler drain leak.

There are some issues you can fix on your own, but others must be done by a certified HVAC professional.

Culprit #1: Clogged Condensate Pipe or Pump

The most frequent problem we see that causes leaks is a clogged condensate pipe. Over time as dust or dirt accumulates, it can begin to inhibit the flow through the drain line. Over even longer periods of time, dust and dirt buildup along with condensation can produce rust or algae which further blocks the pipe.

Similarly, the condensate pump can become clogged because of constant exposure to moisture over long periods of time. This can result in mold growth, which can also cause a clog. Also, the pump can simply wear down and not perform as efficiently as before.

Leaks with a constant flow rather than slow drip can mean a condensate pipe has become disconnected or punctured. If that’s the case, it’s important to get your HVAC system serviced as soon as possible to avoid additional problems including further damage to your house. Contact Young’s Home Comfort if you’re in Montgomery County PA to have an HVAC tech fix your leak.

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Culprit #2: Frozen Evaporator Coil

If the evaporator coil gets frozen, this can also cause leaks in various places as well. Common causes of a frozen evaporator coil are a clogged and dirty air filter, or low refrigerant levels.

A clogged air filter can cause the system to work harder than it should need to work. A clogged air filter can also result in the evaporator coil getting colder than usual and freezing. Fortunately, it’s easy to check if the air filter is the problem. Simply pull out the filter and see if there’s too much dust and dirt buildup, and replace the filter if it’s clogged.

The most obvious way to tell if the refrigerant level is dropping too low is if you notice any leaks in the refrigerant lines. Another indication that the refrigerant level may be too low is that the system is not cooling the house down like it typically would, or if you hear a hissing sound.


Getting Your Leak Fixed

It’s important to fix any leaks in your HVAC unit as quickly as possible. Now that you’re familiar with the two most common culprits for why your HVAC could be leaking water, if you don’t feel confident further diagnosing the problem or if you need help fixing it, our team of HVAC specialists here at Young’s Home Comfort are ready to serve you! Click the button below to request a service call today!

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