Heat pump outside unit dripping water in Greater Vancouver

Water dripping or pooling under your outdoor heat pump is usually a sign the unit is doing exactly what it should. In heating mode, melting frost and condensation both produce water, and that water has to go somewhere. The key is knowing the difference between healthy drainage and water that signals a drainage or icing problem in our wet Greater Vancouver climate.

Where the water comes from

During heating, the outdoor coil collects frost from the humid air. Each defrost cycle melts that frost, and the meltwater runs out the bottom of the unit. On top of that, normal condensation forms on cold surfaces. So a heat pump that drips during and after defrost cycles, and shows damp ground beneath it, is behaving normally.

In cold weather this meltwater can refreeze on the pad or the surrounding ground. A little ice underneath is common, but a growing mound of ice that lifts the unit or blocks the base means water is not draining away as it should.

• Meltwater from defrost is the main source of dripping
• Condensation adds to the water you see
• Some refreezing underneath is normal in cold spells

Keeping drainage healthy

The unit should sit on a pad or stand that lifts it above grade so water can run off and away. Make sure the base is not buried in leaves, soil, or snow, and that nothing dams the meltwater against the unit. Good drainage matters even more in older Vancouver homes where outdoor units sometimes sit in tight side yards with poor slope.

Call a licensed technician if water is leaking from indoor parts of the system, if a solid ice block keeps forming at the base, or if dripping comes with weak heat and constant frost. Those signs go beyond simple drainage and may involve the coil, defrost system, or refrigerant, which are not homeowner repairs.

• Keep the unit raised on its pad or stand
• Clear leaves, soil, and snow from the base
• Ensure meltwater can flow away, not pool against the unit
• Call a pro for indoor leaks or persistent ice mounds

Frequently Asked Questions

Is it normal for my outdoor heat pump to drip water?

Yes. Melting frost from defrost cycles plus condensation both produce water that drains out the bottom of the unit. Damp ground beneath the unit in winter is expected behaviour.

Why is ice forming under the unit?

Meltwater can refreeze on the pad in cold weather. A thin layer is normal, but a growing ice mound that lifts the unit or blocks drainage should be addressed so water can run away freely.

Should I be worried about a small puddle?

A small puddle from defrost is normal, especially in our rainy climate. Concern is warranted only if water leaks from indoor components, a large ice block builds up, or heat output is weak with constant frost.

How can I help the unit drain better?

Keep it raised on its pad, clear leaves, snow, and debris from the base, and make sure the ground slopes water away. Avoid letting anything dam the meltwater against the unit.

HeatLand Heating & Cooling is a licensed and insured, TSBC-certified HVAC company serving homeowners across Greater Vancouver. Our technicians diagnose the real fault, explain your options in plain language, and complete the work safely and to code.

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