Thermador freezer error E34 is commonly caused by an issue with the hopper flap switch. This switch is essential for the ice dispensing process, as it ensures that ice is released properly from the hopper. If the hopper flap does not open as it should, it can interrupt both ice production and dispensing, resulting in Error E34.

Appliance Behavior: The ice maker has stopped producing ice, displaying Error Code E34 on the control panel. This error indicates a problem with the hopper flap switch, preventing the ice maker from functioning correctly.

Recommended Solution: To troubleshoot the issue, start by removing the hopper to access the flap mechanism. Manually move the hopper flap opening lever arm to check for any resistance or if it is stuck. If the lever arm moves freely without any obstructions, the problem may be with the crusher lever motor mechanism, which controls the flap. In this case, the crusher motor might be faulty and may need to be replaced. Replacing the crusher mechanism should restore normal ice production and resolve the error.