>> Someone just changed the battery in a Hilka safe from Argos.
>> Does anyone know the default combination? :-(
>>
>> Roger.
>
> I think they usually default to just four combinations:
>
> 9999
>
> 1111
>
> 1234
>
> 5678
>
> But don't just try these and give up, it will be something silly like 6789
> or 0123, so keep trying. :-))
Most electronic systems will have measures to defeat such probing. Typically after two or three wrong codes, some timer will be invoked during which all codes will be considered wrong, and each further wrong code entered will double the timeout. Might be even worse in that after so many wrong codes, no code will ever open it, like the PIN numbers for SIM cards and cash cards and some car radios.