A Geyser that is leaking (dripping) through the pressure control valve overflow pipe is usually normal behaviour. This however should be limited to no more that a few litres per day and usually only after using the taps.
If this is not the case or the geyser is leaking from a different part then it may be time to give us a call. A burst geyser can create a lage mess and it is better to catch it before it becomes and issue.
Give us a call and let us know the size of the geyser you have these range from 100L to 250L for residential units.