Stays in wash cycle.
Here are your parts
Replacement parts for FRIGIDAIRE FDB1050REB2 Frigidaire/dishwasher | AppliancePartsPros.com
Here is the tech sheet
http://manuals.frigidaire.com/prodinfo_pdf/Kinston/154547901.pdf
Often long wash times are due to the unit trying to reach a temperature set point and being unable to get there.
Try a cycle that does not include water heating.
Chjeck that the incoming water is at least 120 degrees F.
Could be the heating element, the hi-limit thermostat, the thermistor or the control board.
Try running diacnostics to see if that gives you some clues.
I have a dishwasher Moder FDB1050REB2. The system is not working. We have check the electrical outlet and it has current. I think it might be the control panel. Is there anything else I can check before I order the part.
Thanks
Al