Ariston
Water Quality / Anode Reaction
Ariston water heater's hot water has a metallic or rotten egg (sulfur) smell.
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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
Magnesium anode reacting with high sulfur content water, Bacterial growth in tank, Long periods of low usage, Old or depleted anode rod
How to Fix / Troubleshooting
Safety first: Turn off power and allow water to cool before draining.
- Flush tank: Drain and flush the tank thoroughly to remove stagnant water and sediment.
- Inspect anode rod: Remove the anode from the top of the tank. If heavily corroded or missing, replace it. In problem areas, consider an aluminum-zinc anode compatible with Ariston tanks.
- Disinfect tank: Refill with a dilute chlorine solution (following local guidelines), let sit, then flush thoroughly until odor disappears.
If odor persists, consult a water treatment specialist for additional filtration or treatment options.
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Repair Difficulty
Medium
3/5
Required Part
Magnesium Anode Rod
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