A puddle near your HVAC unit might seem small. But if your heat pump is leaking water, it can signal a serious issue. Left unchecked, it could lead to water damage, mold, electrical hazards, and reduced system efficiency. In this guide, we’ll explain exactly why your heat pump is leaking water, what you can do about it, and when to call a pro.
The most common reason your heat pump is leaking water? A blocked drain line. Your system pulls moisture from the air as it cools. This water collects in a pan and drains through a small pipe. But if the line is clogged with dirt, mold, or debris, water backs up—and starts leaking.
Fix it: Try flushing the line with white vinegar or use a wet/dry vacuum on the outdoor end. If that doesn’t work, call in a technician.
If your heat pump is leaking water after running for a while, a frozen evaporator coil might be the culprit. Ice forms when there’s restricted airflow or low refrigerant levels. Eventually, the ice melts and overflows the drain pan.
Fix it: Shut off your system to let it thaw. Check your filters, and call a pro if the issue keeps coming back.
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Over time, drain pans rust, crack, or shift out of alignment. If your heat pump is leaking water, especially underneath the indoor unit, check the drain pan first.
Fix it: Replacing a damaged drain pan is typically a quick repair for HVAC pros.
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If your filter is clogged, airflow gets restricted, leading to frozen coils and—you guessed it—water leaks.
Fix it: Change your air filter every 30–90 days. If your heat pump is leaking water, start here before moving to more complex solutions.
Is your heat pump new? If your heat pump is leaking water right after installation, it could be due to a unit that wasn’t leveled correctly. When this happens, condensation doesn’t drain as it should.
Fix it: A licensed technician can re-level the unit and check for any installation errors.
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During muggy Vancouver summers, your heat pump has to work harder to remove moisture. If your heat pump is leaking water consistently during humid days, the unit may be overwhelmed.
Fix it: Use a dehumidifier in especially damp rooms and have your system tuned up for optimal moisture control.
Sometimes, the issue is purely mechanical. A drain line can disconnect due to vibration or poor installation. If your heat pump is leaking water from an unexpected place, this might be why.
Fix it: Inspect the line and reconnect it if needed. For older units, clamps or sealants may be necessary.
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Low refrigerant levels can cause your coils to freeze, and then leak when they thaw. If your heat pump is leaking water and not cooling efficiently, this could be the reason.
Fix it: Call a technician to inspect and recharge the system. Refrigerant leaks also require proper environmental handling.
Spring and fall are ideal times to spot problems. If your heat pump is leaking water, consider the seasonal context:
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If your heat pump is leaking water, don’t ignore it. Minor leaks can lead to major headaches. Whether it’s a simple filter swap or a full repair, Eco Pro Heating is here to help.
Why is my heat pump leaking water inside my house?
Usually due to clogged drain lines, frozen coils, or dirty filters. If your heat pump is leaking water, start by checking those areas.
Is it normal for a heat pump to leak water outside?
Yes—that’s usually condensation. But if your heat pump is leaking water indoors, that needs attention.
Can I still run my system if the heat pump is leaking water?
It’s best to turn it off and diagnose the issue. Running it while it leaks can damage the unit or cause electrical issues.
How often should I check for heat pump leaks?
Seasonally. Always inspect before and after the heavy-use seasons.
Does Eco Pro offer help if my heat pump is leaking water?
Absolutely. Contact us and we’ll get it sorted fast.
Whether you’re dealing with a stubborn pilot light, a noisy blower, or just want to keep your HVAC system running smoothly year-round — Eco Pro Heating & Cooling has your back.
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