Rinnai Error Codes & Troubleshooting

Check gas supply. Clean igniter.

Clean sensor with cloth. Inspect.

Turn off gas. Professional repair.

Check for ice, snow, debris.

Check and clear drain line.

Clean sensor. Check wiring.

Power cycle. Check gas pressure.

Check water supply. Bleed air.

Check vent for obstructions.

Check meter. Contact supplier.

Professional service needed.

Professional cleaning recommended.

May need descaling. Professional.

Power cycle. Professional service.

Professional replacement needed.

Verify thermostat settings.

Evacuate. Call gas company.

Professional inspection urgently.

System locked. Professional reset.

Turn off immediately. Professional.