Termet Internal Water Leak

Water heater is leaking water from the bottom of the casing.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Corroded primary heat exchanger on Termet heater, Leaking hydraulic block or O-rings, Loose union on inlet/outlet connections, Cracked condensate trap (condensing models)

How to Fix / Troubleshooting

Safety: Turn OFF power and close the water and gas supplies. Water leaks can damage electronics and cause electrical hazards.

  • Identify leak source: Remove the front cover and use a flashlight to locate the exact origin of the leak. Dry the area and observe while briefly turning water back on.
  • Tighten fittings: Carefully tighten any loose union nuts on the cold inlet and hot outlet. Do not overtighten plastic parts.
  • Replace seals: If leaks are from the hydraulic block or pipe joints, replace the O-rings or gaskets with Termet-approved parts.
  • Heat exchanger or condensate: If water drips from the heat exchanger body or condensate trap, these components may need replacement by a Termet technician.
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Repair Difficulty

Hard 4/5

Required Part

Hydraulic Block Assembly
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