Sorry for the motor.
Here on APUG there are threads with alternative motors to be installed.
It's also possible IIRC that the motor should be dismounted and cleaned/revised.
Never shot Provia.
39.7 °C seems too warm and could be the cause of the green cast.
I set at 38.3 and let all the system reach the same temperature by leaving it on for more than half an hour, even an hour with heating on and pump on. That way the entire mass (water, Jobo, beaker, flasks, tank) will come close to 38.3.
Actually I turn the Jobo on with water this way, and then begin preparing the solutions, so that for the entire time I employ to prepare the bath the Jobo is warming up. And after I finished preparing the last bath, I wait for at least half an hour more before processing.
EDIT There is a safety reversible fuse that "trips" in case of overheating or some other problem. It can be rearmed manually. It is located on the left side of the Jobo, there should be a sticker with a writing "overheating protection" or such. By the way, the Jobo must not be operated without water.