Drazice
Bacterial Contamination and Anode Reaction
Drazice water heater produces a rotten egg (sulfur) smell in hot 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
Sulfate-reducing bacteria in tank, magnesium anode reacting with high sulfate water, low operating temperature promoting bacterial growth
How to Fix / Troubleshooting
Safety: Be cautious of hot water and steam when raising temperatures.
Steps:
- Temporarily increase the thermostat setting to 60–70°C and run an anti-legionella cycle if available, then flush hot water through all taps to disinfect the system. Warn occupants about scalding risk.
- Drain and flush the tank thoroughly.
- Inspect the magnesium anode; in some cases, replacing it with an aluminum or aluminum-zinc anode (if approved by Drazice for your model) can reduce odor.
- Maintain the heater at a temperature that discourages bacterial growth (typically above 55°C) and use mixing valves to control tap temperature.
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Repair Difficulty
Medium
3/5
Required Part
Magnesium Anode Rod
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