Hi,

You need to check the following: Nothing connected to the saniflow is running e.g. tap dripping, ball valve in toilet cistern stuck/faulty

Any of these faults will cause the saniflo to run continuously. If none of these are visible then there is a chance that a flow switch is stuck or faulty within the unit.

I would carry out the checks first then call in an expert to service the unit.

I hope this helps.