i have a flow master digitcal with a built in charger a while ago the charger packed in was just working it as flow controler but this keeps starting and cutting out would you say its on its way out , I have also have a dial flowmaster had this longer and thats still going strong
It does sound as it is on its way out, There are any number of reasons for this, as for the charger it sounds like the relay may have gone or even be moisture damage to the board.
If you wanted it repaired the suggestion would be to return it to PF. The price shown by Traps gives you an approx idea of what it would cost.
Sounds like you also have an older V3 analogue nice to hear that it is still going well. As for replace or repair - one advantage of replacing would be the new control would have a 12 month warranty.
Ian