31
Immergas Ionization Circuit Fault

Furnace shows 31, no ignition, may be associated with ionization issues

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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

Short to earth on ionization cable, Incorrect electrode positioning, Faulty PCB ionization amplifier

How to Fix / Troubleshooting

Safety: Turn off power and gas before opening the combustion chamber.

Steps:

  • 1. Inspect ionization cable: Look for damaged insulation or points where the cable may touch metal parts. Reroute or replace if necessary.
  • 2. Check electrode position: Ensure the ionization electrode is correctly aligned in the flame path as per Immergas specifications.
  • 3. Clean electrode: Gently clean with fine abrasive pad to remove oxidation.
  • 4. Technician check: If the electrode and cable are good, the PCB ionization circuit may be defective and require replacement.
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Repair Difficulty

Hard 4/5

Required Part

Ionization Electrode
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