Defro Mechanical Wear or Obstruction in Screw Feeder

Unusual grinding or squealing noise from the screw feeder area during operation

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.

Possible Causes

Worn auger bearings, Foreign objects in feeder tube, Misaligned auger shaft, Insufficient lubrication of gearbox

Safety: Disconnect power and wait for all moving parts to stop. Do not reach into the feeder.

Remove the feeder inspection cover and visually inspect for stones, metal, or oversized fuel pieces.
Empty the hopper and check the auger intake for foreign objects.
Listen to the gearbox when briefly powered (technician only); loud grinding suggests internal wear.
Check auger shaft alignment and mounting bolts.

Worn bearings or gearbox components should be replaced as a unit to avoid sudden failure.

Hard 4/5

Screw Feeder (Auger) Assembly

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