Error code

Vaillant All models code 22

No approved translation for this record yet; showing the original text.

Meaning

Safety switch-off, water shortage

Member details

Signed-in members see the LED pattern and how to read the code with the remote control on eligible records.

Possible causes

No or insufficient water in boiler, cable for pump, water pressure sensor or volume flow sensor loose/not plugged in/defective, pump blocked or defective, pump output too low, non-return valves blocked/incorrectly installed, minimum quantity of circulation water not reached, flow sensor defective

Solution

Solution steps are not shared for faults that may be dangerous.

No do-it-yourself solution is given for this fault. For your safety, call an authorised service.

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