Saunier Duval Appliance Repair in Grange

What does error code 12 mean on a Saunier Duval Themaclassic boiler?

Error 12 on a Saunier Duval Themaclassic boiler indicates a user interface or main board reception fault. The display unit is not communicating correctly with the main circuit board. Switch off the boiler and contact a Gas Safe registered engineer.

What does error code 17 mean on a Saunier Duval Themaclassic boiler?

Error 17 on a Saunier Duval Themaclassic boiler indicates the power supply voltage has fallen below 170V. Check if other electrical appliances are affected. For isolated boiler issues, contact a Gas Safe registered engineer.

What does error code 05 mean on a Saunier Duval Isofast boiler?

Error 05 on a Saunier Duval Isofast boiler indicates overheating. Switch off the boiler and allow it to cool down completely for at least 30 minutes before resetting. If the fault recurs, contact a qualified heating engineer.

What does error code 10 mean on a Saunier Duval Isofast boiler?

Error 10 on a Saunier Duval Isofast boiler indicates a fan fault. The fan may be blocked or faulty. Contact a Gas Safe registered engineer and do not use the boiler until resolved.

What does error code 18 mean on a Saunier Duval Themaclassic boiler?

Error 18 on a Saunier Duval Themaclassic boiler indicates a user interface fault. The control panel is faulty. Contact a qualified heating engineer as the user interface may need replacement.

How do I set my Saunier Duval boiler for a holiday or extended absence?

If you have a programmable thermostat or controller, use the holiday mode function to maintain a low temperature while you are away. If your thermostat does not have a holiday mode, simply lower the room thermostat to a minimum setting that prevents freezing, typically around 10°C. Keep the boiler powered on so frost protection remains active. Never turn off the gas supply during cold weather as this disables frost protection.

How do I switch my Saunier Duval boiler between summer and winter modes?

The summer/winter switch allows you to disable central heating while keeping hot water available. In winter mode, both heating and hot water functions are active, with domestic hot water having priority. In summer mode, central heating is disabled but hot water remains available. The location and type of switch varies by model - it may be a lever, rotary switch, or push button.

How do I use the temperature controls on a Saunier Duval boiler?

Most Saunier Duval boilers have two temperature selectors: one for domestic hot water and one for central heating. For domestic hot water, the range is typically 38°C to 60°C, with an ECO setting suitable for everyday use. For central heating, the range is typically 38°C to 73°C.

How often should I have my Saunier Duval boiler serviced?

Saunier Duval recommends having your boiler serviced annually by a Gas Safe registered engineer. This regular maintenance helps ensure continued efficient and safe operation. A more comprehensive strip-down service is recommended every 5-6 years to inspect internal components more thoroughly.

What is included in a Saunier Duval boiler service?

A typical annual service includes operating the boiler to check for faults, inspecting the burner and heat exchanger, cleaning components as needed, checking the flue system for obstructions and secure fittings, verifying correct gas pressures, testing safety devices, and checking all gas connections for leaks using detection fluid.