Grant Vortex Fault Codes

Oil Oil 12-70 kW 2002-present

All 22 fault codes

Code	Severity	Plain English	DIY
C2849	High	Your boiler has stopped working because of a communication failure between its internal electronic brains and a fault in the ignition system.	Engineer
E01	High	Your boiler's main internal computer has encountered a processing error and cannot safely operate.	Yes
EE1	High	Your boiler has sensed a blockage or a pump failure that is stopping water from moving through the system properly.	Yes
EE2	High	Your boiler has detected that the water pressure in the central heating system is too low to operate safely.	Yes
EE3	High	Your boiler has stopped working because it has lost the electrical connection to its temperature sensor.	Engineer
EE4	High	Your boiler has detected that the electrical wiring coming into the unit is connected the wrong way round.	Engineer
EE8	High	Your boiler's main control board has lost contact with the digital display or internal computer, meaning it can no longer send or receive instructions.	Engineer
Flashing on and off	Low	Your boiler is temporarily pausing to melt away ice build-up and protect the external components during very cold weather.	Yes
No display	High	Your boiler has lost all power to the control screen because an internal electrical component has stopped working.	Engineer
OPn	High	Your boiler has detected that a temperature sensor cable has disconnected or become faulty, preventing the system from monitoring water flow correctly.	Engineer
OUTDR	Low	Your boiler has lost connection with its outside temperature sensor, which means the heating might not adjust correctly to the weather.	Engineer
PP1	High	Your boiler has stopped working because it cannot correctly measure the temperature of the water returning to the unit.	Engineer
PP1	High	Your boiler has lost its ability to measure the temperature of the water coming back into the system, causing it to stop running for safety.	Engineer
PP2	High	Your boiler has detected a problem with a sensor that monitors the temperature of the exhaust gases, and it has likely stopped working as a safety precaution.	Engineer
PP3	High	Your boiler has stopped working because an internal sensor that monitors the temperature of the heating coil is no longer sending a correct reading.	Engineer
PP4	High	Your boiler has stopped working because one of its internal sensors is failing to monitor the temperature of the water returning to the unit.	Engineer
PP5	High	Your boiler's internal thermometer that measures the air around it has stopped working properly, preventing the system from operating safely.	Engineer
PP6	High	Your boiler has shut itself down because the internal gases have reached an unsafely high temperature to protect the system from damage.	Engineer
PP7	Low	Your boiler has detected very cold temperatures and is automatically running to prevent the internal pipes from freezing.	Yes
sHr	High	Your boiler has detected an electrical fault with its internal temperature sensors and has stopped running as a safety precaution.	Engineer
SUP	High	Your boiler's temperature sensor has stopped sending the correct signals, meaning the system doesn't know how hot the water is and has shut down as a precaution.	Engineer
U2453	High	The boiler's internal computer has encountered a communication error between its memory and control systems, which prevents it from running correctly.	Engineer

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