Tesy Insufficient Capacity or Stratification Issue

Water heater frequently runs out of hot water faster than expected.

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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

Incorrect thermostat setting, failed upper element in dual-element models, cold water dip tube damage, excessive hot water demand

How to Fix / Troubleshooting

Safety first: Turn off power before testing elements or opening covers.

Steps:

  • Check thermostat setting: Ensure the set temperature is appropriate (typically 55–60°C with mixing valve).
  • Test elements (if dual): On Tesy models with two elements, test both for continuity. Replace any failed heating element assembly.
  • Inspect dip tube: If accessible, check the cold water inlet dip tube for cracks or dislodgement, which can mix cold water at the top of the tank.
  • Usage review: Compare heater capacity to household demand. If undersized, consider upgrading to a larger Tesy model.
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Repair Difficulty

Medium 3/5

Required Part

Heating Element Assembly
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