Error code

Vaillant All models code 53

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Meaning

Unit is observing the waiting time for the modulation block/operation block function due to a water shortage (flow-return difference too large)

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

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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