Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to Thermador refrigerators
- Confidence medium
- Also displayed as E30, E31
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
These codes point to the ice-maker mechanism or its temperature sensing. E30 concerns the tray motor or ice-level switch, E31 the tray sensor, and E37 a combined ice-tray and compartment-sensor fault.
Most likely causes
- Ice or a container is blocking the tray or level arm
- A failed tray motor or ice-level switch
- A failed ice-maker temperature sensor
- A loose connector, damaged harness or dispenser-control fault
Safe checks for the owner
- Remove loose ice that visibly blocks the tray or level arm.
- Turn the ice maker off if it repeatedly cycles or makes grinding sounds.
- Keep the freezer cold and avoid forcing the tray by hand.
Estimated U.S. repair cost
$220–$450, depending on model, access, parts availability and local labor.