E10
Danstoker Insufficient or Excessive Draft

Boiler controller shows E10; flue gas draft or chimney pressure fault.

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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 chimney or flue, Faulty draft sensor or differential pressure switch, Incorrectly set flue damper, Failed induced-draft fan (if fitted on Danstoker system)

How to Fix / Troubleshooting

Safety: Turn off boiler and allow flue to cool. Risk of flue gas spillage; ensure good ventilation.

  • Inspect chimney and flue: Check for visible obstructions at the flue terminal. If safe, open inspection doors and look for soot buildup or collapsed liners. Have a chimney professional clean if needed.
  • Check draft sensor: Locate the draft sensor or differential pressure switch connected to the flue. Inspect tubing for blockages and ensure correct orientation. Replace if readings are erratic.
  • Verify flue damper position: Ensure any motorized or manual flue dampers are fully open during operation and correctly interlocked with the Danstoker control.
  • Induced-draft fan (if present): Confirm the fan runs and that its speed control (VFD) is functioning. Listen for unusual noises indicating bearing failure.

Persistent E10 requires a combustion specialist to measure draft and adjust the flue system.

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Repair Difficulty

Hard 4/5

Required Part

Flue Draft Sensor / Differential Pressure Switch
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