A12
Riello
Gas/Oil Valve Control Fault
Boiler displays gas valve or fuel valve fault, no ignition sequence
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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
Faulty gas valve coil (gas models), Faulty oil solenoid coil on Riello oil pump, Broken wiring between control box and valve, Control box output failure
How to Fix / Troubleshooting
Safety: Work on gas or oil valves must be done by qualified personnel. Do not attempt to open or adjust valves yourself.
- Listen for valve click: During ignition, you should hear a click from the gas valve or oil solenoid. Absence of this may indicate a coil or control fault.
- Check connectors: With power isolated, ensure the valve coil plugs are firmly connected and not corroded.
- Visual inspection: Look for signs of overheating or burning on the valve body or wiring.
- Professional testing: A heating engineer should measure coil resistance, verify voltage at the valve during ignition, and replace the gas valve or oil solenoid coil as required.
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Repair Difficulty
Professional Required
5/5
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