Ferroli Ignition Sequence Interruption

Water heater fan runs but there is no ignition and no error code for several seconds, then unit stops.

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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

Air pressure switch not proving, Ignition electrode not sparking, PCB not sending ignition command, Loose earth connection

How to Fix / Troubleshooting

Safety: Turn off power and gas before working on ignition components.

  • 1. Listen for spark: During startup, you should hear a rapid clicking. If not, inspect the ignition electrode and cable for damage and secure connections.
  • 2. Check air pressure switch: Ensure tubes are correctly connected and not blocked. Replace the switch if it does not change state when the fan runs.
  • 3. Earth connection: Verify that the Ferroli chassis is properly earthed; poor earth can affect ignition.
  • 4. PCB output: A technician should test for high-voltage output to the igniter and replace the PCB if no output is present.
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Repair Difficulty

Hard 4/5

Required Part

Ignition Electrode
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