Grant Vortex 15-20 Fault codes & diagnostics

Your boiler's electronic brain is unable to communicate correctly, which has caused it to lock out to prevent unsafe operation.

Your boiler's main control computer is experiencing an error, which has caused it to stop the burner from operating to prevent further issues.

Your boiler's electronic brain is malfunctioning and needs to be replaced by a professional to get your heating system running again.

Your boiler's electronic control brain is experiencing a internal fault and is unable to safely ignite the burner.

Your boiler's temperature sensor is disconnected or faulty, meaning it cannot accurately track the heat of the water and has stopped your heating from working.

Your boiler's temperature sensor is failing to communicate properly, which is preventing it from heating your water correctly.

Your boiler's internal control brain is experiencing an electronics failure and can no longer reliably signal the system to move hot water around your home.

Your boiler's central control board is struggling to signal the water pump, which means your heating may not turn on or circulate effectively.

Your boiler is struggling to detect the temperature of your hot water supply, which means it will likely stop heating your water until a faulty sensor or internal control board is replaced.

Your boiler is having trouble sensing the temperature of your hot water supply, which means it cannot heat your water properly.

Your boiler is struggling to accurately measure the temperature of the water inside its internal storage tank, which means it may fail to provide hot water correctly.

Your boiler is having trouble communicating with one of its internal temperature sensors, which means it has stopped providing hot water as a safety precaution.

Your boiler's electronic brain is experiencing a minor internal error and needs a service visit to replace a faulty control component.

Your boiler's control computer is failing to communicate correctly with the water heating pump, which means the system cannot reliably produce hot water.

Your boiler has failed to light the burner and is currently locked out to prevent any issues.

Your boiler has stopped heating because the internal water pump, which moves hot water around your house, has seized up or failed and cannot restart itself.

Your boiler is struggling because the internal water pump is stuck or not receiving power, which prevents heat from circulating through your home.

Your boiler is struggling to light itself correctly because the internal firing mechanism is becoming partially blocked or worn out.

Your boiler has detected an internal light source that shouldn't be there, so it has safely shut itself down to prevent ignition.

Your boiler has detected light inside the combustion chamber when it should be dark, causing it to lock itself out as a safety precaution.

Your boiler has stopped working because the amount of water in your heating system is too low to run safely.

Your boiler is failing to start because it detects light inside the combustion chamber when it should be completely dark, preventing it from igniting safely.

Your boiler has detected a signal that it is already burning fuel even though it has not been told to start, so it has safely shut itself down to prevent an unsafe situation.

Your boiler has stopped working because it failed to light the burner, meaning you currently have no heating or hot water.

Your boiler has failed to start after several repeated attempts and has now automatically shut down for safety to prevent fuel buildup.

Your boiler has disabled itself for safety after multiple failed attempts to start the burner, and it now requires a specific cooling period or a professional reset to clear the lock.

Your boiler has detected an internal electrical issue affecting the fuel delivery system, which is preventing it from firing up safely.

Your boiler is unable to safely vent exhaust gases because the air-moving fan inside the unit has failed or lost its electrical connection.

Your boiler's electronic brain is experiencing a communication error, which is preventing it from firing up reliably.

Your boiler is struggling to circulate water, meaning your heating and hot water will likely stop working until the pump is checked.

Your boiler's internal water pump is not running correctly, which means the system cannot move hot water around your home to heat your radiators or taps.

Your boiler has detected a temporary issue with the burner and has safely shut itself down to prevent any damage.

Your boiler has detected that the water inside it is getting too hot and has automatically paused to prevent overheating, but it should restart once it has cooled down sufficiently.

Your boiler has completely lost power and is unable to turn on, meaning it cannot provide any heating or hot water.

Your boiler has detected a problem with the burner ignition and has safely shut itself down to prevent any issues.

Your boiler has stopped itself from running as a safety precaution because the fuel failed to ignite properly.

Your boiler has stopped working to protect itself and needs a manual reset to try and start up again.

Your boiler has detected an issue preventing it from lighting and has shut down for safety; it needs a manual reset to try and start again.

The water pressure inside your heating system has dropped too low, so the boiler has turned itself off to prevent any damage.

Your boiler has lost all power and is completely shut down, meaning it cannot provide any heating or hot water until the electrical supply is restored.

Your boiler’s electrical supply is unstable, meaning the electricity coming from your home is not consistent enough for the boiler to operate safely.

Your boiler has automatically turned itself off because it has become too hot, which is a safety feature to prevent damage or dangerous conditions.

Your boiler has switched itself off because it has become dangerously hot, likely due to a circulation problem or a system blockage.

Your boiler has stopped working because it failed to ignite or stay lit, requiring an internal safety reset.

Your boiler has stopped working because it failed to light the fuel inside, likely due to a blockage in the oil supply or a dirty sensing component.