Grünbeck Iron Contamination / Resin Fouling

Visible rust or discoloration in softened water

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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

High iron content in raw water, Fouled resin bed, Corroded steel piping downstream, Brine tank contamination

How to Fix / Troubleshooting

Safety: No electrical work required. Close water supply if opening hydraulic parts.

  • Test raw water: Check iron content in the incoming water. If high, an iron filter may be required upstream of the softener.
  • Inspect resin: Have a technician inspect the resin bed for iron fouling. Chemical cleaning with an approved resin cleaner may restore capacity.
  • Check piping: Inspect downstream steel or galvanized pipes for corrosion, which can release rust into the water.
  • Clean brine tank: Empty and clean the brine tank if rust particles are visible in the salt or brine.
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Repair Difficulty

Medium 3/5

Required Part

Ion Exchange Resin and Upstream Filtration
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