Danstoker Reduced Heat Transfer Efficiency

Danstoker boiler flue gas temperature is high and efficiency appears low despite normal firing rate.

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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

Soot or scale on gas side of tubes, Scale on water side due to poor water treatment, Bypassed economizer, Incorrect baffle arrangement in boiler passes

How to Fix / Troubleshooting

Safety: Allow boiler and flue to cool before opening access doors.

  • Clean gas side: Open access doors and brush/vacuum soot from tubes and passes.
  • Check water treatment: Review water treatment records; if poor, schedule internal inspection and possible descaling.
  • Economizer: Ensure any Danstoker economizer is in service and not bypassed without reason.
  • Inspect baffles: Verify that internal baffles are correctly installed and not missing or displaced.

For persistent efficiency issues, a boiler specialist should perform a full efficiency and combustion analysis.

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Repair Difficulty

Hard 4/5

Required Part

Boiler Tubes / Economizer
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