Immergas Internal Water Leak

Water heater is leaking 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 safety relief valve, Corroded primary heat exchanger, Loose union fittings, Cracked plastic hydraulic components

How to Fix / Troubleshooting

Safety: Turn off power and close water and gas valves. Place a container under the unit to catch drips.

  • Identify leak source: Remove the front cover and carefully inspect with a flashlight. Look at the safety valve discharge pipe, pump unions, heat exchanger connections, and plastic manifolds.
  • Check safety valve: If water is dripping from the safety valve outlet, system pressure may be too high or the valve may be faulty.
  • Tighten unions: Gently tighten any slightly loose compression or union fittings, but do not overtighten plastic parts.
  • Do not operate with active leak: If the leak source is the heat exchanger or a cracked component, keep the unit off and call a technician.

Warning: Water leaks can damage electronics and the building; address immediately.

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Repair Difficulty

Hard 4/5

Required Part

Safety Relief Valve
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