E17
Termet Condensate Drain / Level Fault

Heater shows E17, often related to condensate issues on condensing Termet models.

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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

Blocked condensate trap, Frozen or kinked condensate drain pipe, Faulty condensate level sensor, Incorrect trap installation

How to Fix / Troubleshooting

Safety: Switch OFF power. Condensate is mildly acidic; wear gloves and eye protection.

  • Check drain pipe: Ensure the condensate pipe slopes continuously downward and is not frozen or blocked. Thaw gently if frozen.
  • Clean trap: Remove the condensate trap from the bottom of the Termet heat exchanger. Empty and rinse it thoroughly to remove sludge. Refill with clean water before reinstalling.
  • Level sensor: If fitted, inspect the condensate level sensor and wiring. Clean any deposits from the sensor.
  • Test operation: Restore power and run the heater. Verify that condensate flows freely to the drain.
  • Technician: If E17 persists, have a Termet technician check the condensate system and replace the trap or sensor if necessary.
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Repair Difficulty

Medium 3/5

Required Part

Condensate Trap Assembly
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