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Error code reference

Daewoo Freezer Error Code DR

Door has been sensed open for more than 1 hour.

Daewoo codesDaewoo freezer codes

Door has been sensed open for more than 1 hour.

First step from the service manual

Measure the DC voltage at Main PCB CN3 between PINs 5 and 6; with door closed normal reading is 5 VDC, with door open normal reading is 0 VDC.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What DR means on a Daewoo freezer

The DR error code on a Daewoo freezer indicates that the door has been detected in the open position continuously for more than one hour. The freezer monitors door status through a door switch circuit connected to the main PCB. Specifically, the signal is read at connector CN3 between pins 5 and 6, where the logic is straightforward: a closed door produces 5 VDC at those pins, and an open door produces 0 VDC. When the controller sees 0 VDC sustained for over 60 minutes, it triggers the DR alert to warn of potential temperature and food safety issues.

The most reliable first diagnostic step is to measure the DC voltage at CN3 pins 5 and 6 on the main PCB with the door physically closed. A reading of 0 VDC when the door is confirmed shut points to a fault in the door switch circuit rather than an actual open door condition. This could mean the switch itself has failed, the wiring between the switch and the PCB is broken or shorted, or the connector at CN3 has a poor contact. Conversely, if voltage reads correctly at 5 VDC with the door closed, the switch circuit is functioning and the problem is likely a mechanical door alignment or seal issue causing the door to remain genuinely ajar.

Prolonged door-open conditions, whether real or falsely detected, have compounding effects on the appliance. The compressor runs excessively, interior temperatures rise, frost accumulates rapidly around the door gasket area, and stored food may reach unsafe temperatures. Resolving the DR code promptly is important both for appliance longevity and food preservation.

Source: manufacturer service documentation.

Common causes of DR

  1. 01

    Faulty door switch

    Part replacement

    The door switch may have failed mechanically or electrically, causing it to report an open door even when the door is fully closed. Measuring 0 VDC at CN3 pins 5 and 6 with the door shut confirms this is the problem.

  2. 02

    Door left physically open or ajar

    Wiring / connection

    The most straightforward cause is the door simply being left open or not fully latched. Check that nothing inside the freezer is obstructing the door from closing completely.

  3. 03

    Worn or damaged door gasket

    Part replacement

    A degraded door gasket may allow the door to appear partially open to the switch even when pushed closed. Inspect the gasket around the full perimeter for tears, compression loss, or gaps.

  4. 04

    Wiring fault between door switch and main PCB

    Wiring / connection

    Damaged, pinched, or disconnected wiring between the door switch and CN3 on the main PCB can interrupt the 5 VDC signal, making the controller read 0 VDC regardless of door position. Inspect the harness routing and connector seating.

  5. 05

    Main PCB fault at CN3

    Part replacement

    If the wiring and door switch both test correctly, a failure on the main PCB itself at the CN3 input circuit may be preventing proper voltage reading. This is the least common cause and is typically diagnosed after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about DR

What does DR mean on a Daewoo freezer?
The DR code means the freezer's control board has detected that the door was open, or registering as open through the door switch circuit, for more than one continuous hour. The board monitors a signal at connector CN3 pins 5 and 6 on the main PCB, where 5 VDC indicates a closed door and 0 VDC indicates an open door. When that signal stays at 0 VDC for over 60 minutes, the DR alert is triggered. The cause may be a genuinely open door, a faulty door switch, or a wiring issue.
How do I fix the DR error code on my Daewoo freezer?
Start by confirming the door is fully closed and nothing inside is blocking it from seating properly. Then measure the DC voltage at main PCB connector CN3 between pins 5 and 6 with the door closed: you should read 5 VDC. If you read 0 VDC with the door shut, the door switch or its wiring circuit is the likely culprit and should be tested and replaced as needed. Also inspect the door gasket for wear or gaps that could prevent a proper seal.
Will resetting the freezer clear the DR error code?
A power reset may temporarily clear the DR code, but it will return if the underlying cause is not resolved. If the door switch is faulty or the door is not sealing properly, the controller will again detect a prolonged open-door condition and re-display the code. Fix the root cause before relying on a reset.
Is the DR error code a safety concern for my food?
Yes, if the door has genuinely been open for over an hour, the interior temperature of the freezer may have risen enough to compromise frozen food safety. Check the temperature of your food and discard anything that has fully thawed or shows signs of spoilage. If the code was triggered by a faulty sensor rather than an actual open door, your food may still be safe, but you should verify the interior temperature before assuming it is.
How much does it cost to repair a DR error code on a Daewoo freezer?
Repair costs vary depending on the cause. Replacing a door switch is typically a lower-cost repair, with parts generally ranging from $15 to $50 and labor costs varying by region. A new door gasket can range from $30 to $80 depending on the model. Main PCB replacement is the most expensive possibility, with parts and labor potentially totaling $150 to $350 or more. Diagnosing the fault at CN3 first can help you avoid unnecessary parts costs.

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