Saunier Duval Thelia Fault codes & diagnostics

Your boiler has lost pressure, which means there isn't enough water inside the system to circulate heat throughout your home.

Your boiler is failing to light because it cannot detect a flame, meaning you currently have no heating or hot water.

Your boiler is struggling to clear exhaust fumes safely, so it has shut down to prevent any risk of fumes entering your home.

Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or danger.

Your boiler has lost the ability to accurately measure the temperature of the water used for your radiators, causing it to stop heating as a safety precaution.

Your boiler is struggling to accurately detect the water pressure inside the system, which is preventing it from safely starting up.

Your boiler is having trouble communicating with its control panel, which prevents it from receiving accurate instructions to heat your home.

Your boiler's central control unit is experiencing an internal electronic failure and requires professional intervention to restore operation.

Your boiler has detected that the water inside the heating system has become dangerously hot and has shut itself down to prevent damage.

Your boiler is struggling to control its gas supply, which prevents it from safely igniting or maintaining a flame.

Your boiler is failing to start because the electrical supply it is receiving from your home's wiring is too weak or unstable.

Your boiler's electronic display or control panel is having trouble communicating with the main system, causing the unit to stop operating.

Your boiler has lost its connection to the temperature sensor that monitors your heating water, so it has safely shut down to prevent overheating.

Your boiler's electronic control panel is not communicating correctly with the main internal system, preventing it from functioning.

Your boiler is failing to light the pilot flame, which means it cannot produce heating or hot water for your home.

Your boiler is struggling to clear exhaust fumes safely, so it has stopped working to prevent a hazard.

Your boiler is currently unable to safely clear away exhaust gases, so it has stopped working to prevent any potential risks.

Your boiler has detected that it is running too hot and has automatically shut itself down to prevent any damage or danger.

Your boiler has stopped working because it can no longer accurately measure the temperature of the water used for your radiators.

Your boiler is struggling to accurately measure how much water is inside it, so it has stopped working as a safety precaution.

Your boiler's central control computer is experiencing an error, which has caused it to stop working for your safety.

Your boiler is having trouble controlling the supply of gas needed to ignite the flame, so it has safely shut itself down to prevent any issues.

Your boiler is having trouble managing the internal flow of water, which will likely stop your heating and hot water from working.

Your boiler has lost the signal from the sensor that monitors the temperature of the water circulating through your radiators, causing it to stop heating.

Your boiler's electronic control boards are not communicating correctly, which means the system has stopped working because it cannot manage its internal settings.

Your boiler has stopped working because the water pressure inside the heating system has dropped too low.

Your boiler is attempting to start its flame but is failing to maintain it, which means you currently have no heating or hot water.

Your boiler is attempting to start its flame but is immediately shutting down because it cannot confirm that the fire has actually caught.