About this guide
- Written by ApplianceWorth Editorial Team
- Technical contact Victor — appliance technician
- Record updated 2026-07-01
- Applies to Thermador refrigerators
- Confidence medium
- Also displayed as FILTRCHG
- 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
DOOR OPEN indicates the door did not close within the expected time. FILTRCHG is a water-filter replacement reminder, not a cooling-system failure.
Most likely causes
- A door is not fully closed or a shelf/bin is interfering
- A gasket, hinge or door switch is misaligned
- The water filter has reached its replacement interval
- The filter reminder was not reset after replacement
Safe checks for the owner
- Remove anything preventing the door from closing and check the gasket contact.
- Replace the correct water filter when due and follow the model-specific reset procedure.
- Arrange service if the door message remains with the door fully closed.
Estimated U.S. repair cost
$50–$180, depending on model, access, parts availability and local labor.