I have a Frigidaire model FFFH17F2QWA. The door was left open for more than a day when we had a heat wave and we lost all food inside. After disconnecting the power for 24 hours and cleaning out the inside, I restarted it with thermostat set at 5. It would not get cold enough to freeze food. After looking at your website, I purchased a defrost timer and installed it. The freezer now freezes food but seems to run continuously. Otherwise it seems to work fine.