Sime Internal Water Leak

Water heater leaks water from the bottom of the casing.

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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

Leaking primary heat exchanger, Loose pipe union, Cracked hydraulic group, Leaking safety valve or drain

How to Fix / Troubleshooting

Safety: Immediately turn off power and close the cold water inlet and gas valves. Water near electrical components is dangerous.

Steps:

  • Remove front cover: Carefully open the casing and look for the source of the leak.
  • Tighten unions: If the leak is from a compression fitting or union, gently tighten it with an appropriate spanner. Do not overtighten.
  • Check safety valve: If water is discharging from a safety valve outlet, it may be due to overpressure or a faulty valve.
  • Dry electronics: If water has reached the PCB, do not power the unit until inspected by a professional.

Professional help: Leaking heat exchangers, hydraulic blocks, or safety valves should be replaced by a qualified Sime technician.

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Repair Difficulty

Hard 4/5

Required Part

Hydraulic Group or Primary Heat Exchanger
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