About this guide
- Written by ApplianceWorth Editorial Team
- Technical contact Victor — appliance technician
- Record updated 2026-07-01
- Applies to Bosch refrigerators
- Confidence medium
- Also displayed as DF
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
The record-update date is a database timestamp, not proof of a fresh model-specific technical review. Check the applicability below and your manufacturer’s instructions before acting on a guide.
What this code means
The control is not detecting the expected refrigerator or freezer door-switch signal.
Most likely causes
- A door is not fully closing
- A damaged or misaligned gasket
- A failed door switch
- A wiring or control fault
Safe checks for the owner
- Remove items that prevent the door from closing.
- Clean the gasket and confirm even contact.
- Check whether the interior light turns off when the door closes.
Estimated U.S. repair cost
$180–$400, depending on model, access, parts availability and local labor.