Vaillant Boiler Fault Codes:

vaillant boiler fault codes


On/Off Power

Control Knob

(‘0’ is power off)

Power ‘On’ neon.

When Flashing, indicates overheat condition reached!

Hot Water demand.

This should illuminate whenever the hot water

tap is turned on.

Heating demand.

Fan Proved neon: Flashing neon indicates

fan or flue fault

Gas valve operation: Flashing neon indicates

low system pressure! (Check pressure gauge)

Gas burning: Flashing neon indicates NTC sensor faulty/broken.

LOCK OUT!: Unsafe condition reached, call someone!

Boiler Mode setting control:

Hot Water Only, or Heating & Hot Water.

In the event of LOCK OUT, turn knob against the tension spring ‘clockwise’ up to the flame sign,          and release.

TURBOMAX 242/282/1E

Turbomax Plus 824/828E

The most common fault codes for this model:

F.00            NTC Faults.

F.01            NTC Faults.

F.20            Overheat Problem.

F.22            Dry fire, low water in system/Overheat.

F.24            Low water, or Pump failure/blockage.

F.29            Flame extinguished. Fan/flue problem/Gas.

F.28            No ignition/Ignition problem. No gas!

F.60 to F.67

Electronic faults with internal components.

The most common faults for this model:

F.1         No gas, ignition fault, gas valve adjustment,

              Electrode lead defective, Possible flue fault.

F.4         Ignition fault when lit! check as above.

F.5         Overheat fault, overheat stat operated.    

F.6         Flow NTC fault.

F.16       Gas valve fault.

F.17       Check polarity.

F.24       System fault, possible failed pump,

              pump over-run, or air lock.


Ecomax PRO 18/28E

Ecomax 828E