Saunier Duval Appliance Repair in Exwick

What does error code 11 mean on a Saunier Duval Themaclassic boiler?

Error 11 on a Saunier Duval Themaclassic boiler indicates a user interface connection fault. There is a wiring problem between the main board and control panel. Contact a Gas Safe registered engineer to check the connections.

What does error F18 mean on a Saunier Duval Condens boiler?

Error F18 on a Saunier Duval Condens boiler indicates a user interface fault. The control panel is faulty. Contact a qualified heating engineer as the user interface may need replacement.

What does error F16 mean on a Saunier Duval Condens boiler?

Error F16 on a Saunier Duval Condens boiler indicates a flame detection fault - the boiler has detected a flame for more than 5 seconds after the burner stopped. This is a serious gas safety issue. Do not use the boiler. Switch it off at the power supply immediately. If you smell gas, do not operate any switches, ventilate the area if safe to do so, leave the property and call the Gas Emergency Service from outside. Contact a Gas Safe registered engineer immediately as the gas valve may be defective.

What does error code 13 mean on a Saunier Duval Themaclassic boiler?

Error 13 on a Saunier Duval Themaclassic boiler indicates a main board fault. The main printed circuit board is faulty. Contact a qualified heating engineer immediately as the board will likely need replacement.

What does error code 07 mean on a Saunier Duval Themaclassic boiler?

Error 07 on a Saunier Duval Themaclassic boiler indicates a domestic hot water NTC sensor fault. The DHW temperature sensor is faulty or disconnected. Switch off the boiler and contact a Gas Safe registered engineer.

Why does my Saunier Duval boiler provide heating but no hot water?

If your boiler provides heating but not hot water, the most likely cause is a faulty diverter valve (also called a 3-way valve). This valve directs hot water either to the radiators or to the hot water outlet, and when it fails it may become stuck in the heating position. Other possible causes include a faulty hot water temperature sensor or a problem with the boiler controls. Contact a Gas Safe registered engineer to diagnose and repair the issue.

What safety devices does a Saunier Duval boiler have?

Saunier Duval boilers include several safety devices: an overheat thermostat that automatically shuts down the boiler if temperatures become excessive, an air flow safety device that turns the boiler off if flue obstruction is detected, automatic shutdown during power failures (with automatic restart when power returns), and frost protection to prevent freezing in cold conditions.

Is my Saunier Duval boiler compatible with smart thermostats?

Many Saunier Duval boilers manufactured since 2012 are compatible with smart thermostats via the eBus communication protocol. The manufacturer offers dedicated smart controls that integrate directly with compatible boilers for optimal performance. If using a third-party smart thermostat, check compatibility with your specific boiler model. A qualified heating engineer can advise on the best options for your installation.

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.

What should I do if my Saunier Duval boiler shows 0.5bar?

The 0.5bar display indicates that water pressure in your heating system has dropped too low for the boiler to operate correctly. You need to repressurise the system using the filling loop. Open the blue filling tap slowly until the pressure gauge shows between 1 and 2 bar, then close the tap securely.