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Vaillant Turbomax Plus 824/828E

Fault Code Possible Cause Meaning
F.00 NTC FAULTS This means that your Flow NTC (Negative Temperature Coefficient Thermostat) cable is either defective or broken and needs to be replaced
F.01 NTC FAULTS (feed temperature sensor) – faulty connection and open circuit. This means that your Flow NTC (Negative Temperature Coefficient Thermostat) cable is either defective or broken and needs to be replaced
F.10 NTC FAULTS (feed temperature sensor) – short circuit
F.11
F.13 NTC FAULTS (feed temperature sensor) – short circuit
F.20 NTC FAULTS (feed temperature sensor) Your boiler has exceeded the maximum temperature and needs to be allowed to cool down
F.22 DRY FIRE, LOW WATER IN SYSTEM/OVERHEAT This means that there’s either no water in your system, you have a defective pump or the pump lead is defective
F.24 LOW WATER, OR PUMP FAILURE/BLOCKAGE Your pump could be obstructed, running at low capacity, or there could be air trapped in your appliance. Additionally, the pressure in your system might be too low.
F.28 NO IGNITION/IGNITION PROBLEM This means there’s either insufficient gas in the system, a defective electrode, ignition lead or electronic ignitor
F.29 FLAME EXTINGUISHED. FAN/FLUE PROBLEM/GAS Your flame, or pilot light has gone out. Check your flue duct or gas supply to see if there is a problem there.
F.60 GAS VALVE CONTROL – DEFECTIVE Your cable loom which connects to your gas valve might have short circuited. Alternatively, you could have a defective gas valve assembly or electronic control system.
F.61 GAS VALVE CONTROL – DEFECTIVE Your cable loom which connects to your gas valve may have short circuited. Alternatively, you could have a defective gas valve assembly or electronic control system.
F.62 DEFECTIVE GAS VALVE CLOSURE MECHANISM Your boiler has exceeded the maximum temperature and needs to be allowed to cool down
F.63 EEPROM (Electrically Erasable Programmable Read-Only Memory) ERROR This is an electronic fault within your system.
F.64 ELECTRONIC SYSTEM/SENSOR FAULT Your flow or back flow NTC has suffered a short circuit, or an electronic fault
F.65 ELECTRONIC SYSTEM TEMPERATURE TOO HIGH This can happen because of an external heat source or an electrical fault
F.67 ELECTRONIC FAULT IN FLAME SYSTEM

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