Error code

Vaillant All models code 24

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Meaning

Safety switch-off: temperature increase too fast

Member details

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

Possible causes

Pump blocked, poor pump performance, air in boiler, installation pressure too low, non-return valves blocked/incorrectly installed, flow and return NTC mixed up

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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