William B Colorado Springs , CO September 02, 2019 Appliance: Frigidaire Dishwasher FDBB4365FC0 Frigidaire Dishwasher Fdbb4365fc0: U0 vent open code. How to replace Dishwasher Vent Assembly. Installed a new vent assembly Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes