I just had this exact same issue. I found that the power wire that comes from under the unit, into the bottom corner of the freezer door, had corroded and came loose. I pulled the wire apart at the connector, stripped some insulation off the white wire, recrimped the tip on, and put it back into the connector. Once I attached the connectors, the power was supplied to the dispenser and all was well w/ the world again (for now).