15
Biasi Control Board Communication / PCB Fault

Error 15; display may be blank or show erratic characters, heater unresponsive.

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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 PCB failure, Power supply fault, Loose display ribbon cable, Voltage spikes

How to Fix / Troubleshooting

Safety: Disconnect power at the isolator before removing the front panel or PCB cover.

Steps:

  • Check mains supply: Verify that the heater is receiving correct voltage and that fuses or breakers are intact.
  • Inspect PCB connections: Remove the front panel and check that all multi-pin connectors and the display ribbon cable are fully seated.
  • Look for visible damage: Burn marks, swollen capacitors, or a burnt smell from the PCB indicate failure.
  • Power cycle: After reseating connectors, restore power and see if the error clears.

Important: PCB replacement should be carried out by a qualified Biasi technician, as gas settings and safety checks are required afterward.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB
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