Biasi Internal Water Leak

Water heater is leaking water from the bottom or inside the casing.

Advertisements

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.

Advertisements

Possible Causes

Corroded heat exchanger, Leaking pump seals, Loose union joints, Faulty pressure relief valve

How to Fix / Troubleshooting

Safety: Turn off power and close the water isolation valves. Place a container or towels to catch dripping water.

Steps:

  • Locate leak source: Remove the front panel and visually inspect for drips around the pump, heat exchanger, and pipe unions.
  • Tighten unions: Gently tighten any accessible compression or union fittings that are visibly leaking. Do not overtighten.
  • Check pressure relief valve (PRV): If water is discharging from the PRV outlet pipe, system pressure may be too high or the PRV may be faulty.
  • Dry and monitor: After minor tightening, dry the area and monitor for further leaks.

Important: A leaking heat exchanger or pump seal usually requires component replacement by a qualified technician. Do not ignore persistent leaks as they can damage the PCB and electrics.

Advertisements

Repair Difficulty

Hard 4/5

Required Part

Primary Heat Exchanger or Circulation Pump
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements