Oso Insulation Degradation / Overheating

Oso water heater’s casing feels excessively hot to touch during operation.

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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

Internal insulation displaced or saturated with water, Overheating due to thermostat failure, Poor ventilation around unit, High ambient temperature

How to Fix / Troubleshooting

Safety first: Turn OFF power and allow the unit to cool before inspection.

  • Check thermostat setting: Ensure the temperature is not set above manufacturer recommendations.
  • Inspect for leaks: Look for signs of water staining or damp insulation around the cylinder, which can reduce insulation effectiveness.
  • Improve ventilation: Ensure the Oso heater has adequate clearance and airflow as per installation instructions.
  • Service thermostat: If the unit is overheating, test and replace the control thermostat and verify the safety thermostat is functional.
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Repair Difficulty

Medium 3/5

Required Part

Oso control thermostat
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