Amfa4000 Bacterial Contamination / Sulfur Interaction

Amfa4000 produces a rotten egg or sulfur smell in the 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

Bacteria growth in brine tank, Hydrogen sulfide in source water, Long periods of stagnation in resin tank, Infrequent regeneration

How to Fix / Troubleshooting

Safety first: Avoid consuming water with strong odors. Use appropriate ventilation when using bleach.

  • 1. Increase regeneration frequency: Adjust settings so the Amfa4000 regenerates more often, reducing stagnation.
  • 2. Sanitize system: Follow the Amfa4000 sanitization procedure, typically involving adding a measured amount of household bleach to the brine well and running a full regeneration.
  • 3. Clean brine tank: Empty and scrub the brine tank, then refill with fresh salt.

If odor persists and raw water contains hydrogen sulfide, a dedicated sulfur filter may be required upstream of the Amfa4000.

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Repair Difficulty

Medium 3/5

Required Part

Amfa4000 Brine Tank
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