Ideal Icos Fault codes & diagnostics

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

Your boiler has switched itself off because it has detected an unsafe build-up of heat, requiring a professional to check for internal circulation or sensor issues.

Your boiler is failing to light the gas flame after three attempts, which means it has safely shut itself down to prevent a build-up of unburnt gas.

Your boiler’s internal computer has encountered a critical communication error and can no longer control the heating or hot water functions.

Your boiler has shut down because the internal gases have become too hot, causing the system to lock out for safety until it cools down.

Your boiler's computer system is experiencing a major internal processing error and cannot safely manage the heating process.

Your boiler is failing to light the internal flame or keep it burning, which means your heating and hot water have stopped working.

Your boiler has detected that the gases leaving through the flue are getting too hot, so it has automatically shut itself down to prevent damage.