mypros+
Error code reference

Daewoo Refrigerator Error Code Co

Short circuit operation mode active (compressor and F/C-Fan continuous operation).

Daewoo codesDaewoo refrigerator codes

Short circuit operation mode active (compressor and F/C-Fan continuous operation).

First step from the service manual

Automatically cancelled after 30 hours of continual operation (power re-supplied).

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

MyPros+ Max

Get the full diagnostic procedure for Co.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What Co means on a Daewoo refrigerator

The Co error code on a Daewoo refrigerator indicates that the unit has entered a short circuit operation mode. In this mode, the compressor and both the freezer and refrigerator compartment fans run continuously, regardless of the normal thermostat cycling. This is a protective fallback behavior designed to maintain cooling performance when the control board detects a fault condition that would otherwise prevent normal temperature regulation.

This mode is triggered when the main control board loses reliable sensor input or detects a circuit anomaly that prevents standard closed-loop temperature management. Rather than shutting the refrigerator down entirely, the system defaults to continuous compressor and fan operation to keep food cold while signaling the fault condition. The Co code essentially tells you the refrigerator is running in a limp mode, bypassing its normal logic.

The most important technical detail about Co is its automatic cancellation behavior. The mode will self-terminate after 30 continuous hours of operation once power has been restored to the unit. This means a power cycle or brief outage that triggers the fault can often be resolved simply by allowing the unit to run through the full 30-hour window. If the code reappears after cancellation, a persistent underlying fault such as a defective sensor, wiring short, or control board issue should be investigated.

Source: manufacturer service documentation.

Common causes of Co

  1. 01

    Power interruption or voltage fluctuation

    Wiring / connection

    A sudden power outage or voltage spike can cause the control board to lose its operating state and trigger Co mode upon restart. This is the most common and least serious cause, often resolved by the 30-hour auto-cancellation.

  2. 02

    Defective temperature sensor

    Part replacement

    A shorted or open-circuit temperature sensor in either the freezer or refrigerator compartment can cause the control board to lose valid temperature data and default to continuous operation mode. The sensor should be checked for proper resistance values.

  3. 03

    Wiring short or damaged harness

    Wiring / connection

    A short circuit in the sensor wiring harness or control circuit wiring can directly trigger the Co code. Inspect wiring runs near the evaporator and door hinges for pinching, chafing, or moisture damage.

  4. 04

    Faulty main control board

    Part replacement

    If the control board itself has developed an internal fault, it may incorrectly detect a short circuit condition and lock into Co mode repeatedly after each 30-hour cancellation cycle. Board replacement is needed if other causes are ruled out.

  5. 05

    Moisture or ice buildup affecting circuits

    Wiring / connection

    Condensation or ice accumulation around the control board or sensor connectors can create intermittent shorts that trigger Co mode. Inspecting connector terminals for corrosion or moisture intrusion is a useful diagnostic step.

See the test procedure for each cause

Frequently asked questions about Co

What does Co mean on a Daewoo refrigerator?
The Co code on a Daewoo refrigerator means the unit has entered short circuit operation mode. In this state, the compressor and both compartment fans run continuously as a protective measure. The code is designed to keep the refrigerator cooling even when a control fault is detected. It will automatically cancel after 30 hours of continuous operation once power is supplied.
Will the Co error on my Daewoo refrigerator clear on its own?
Yes, the Co error is designed to cancel automatically after 30 continuous hours of operation following a power restoration. You do not need to perform a manual reset. However, if the code returns after clearing, there is likely an underlying fault with a sensor, wiring, or the control board that needs further diagnosis.
Is it safe to keep using my refrigerator while the Co code is displayed?
In most cases, yes. The Co mode is a fallback state where the refrigerator continues to actively cool by running the compressor and fans nonstop. Your food should remain cold during this period. That said, continuous compressor operation increases energy consumption and wear, so it is worth investigating if the code reappears after the 30-hour window.
How do I fix the Co error code on a Daewoo refrigerator?
Start by allowing the refrigerator to run uninterrupted for the full 30-hour auto-cancellation period. If the code clears and does not return, the cause was likely a temporary power event. If it returns, check the temperature sensors for shorts or incorrect resistance, inspect the wiring harness for damage, and examine connector terminals for moisture or corrosion. Persistent recurrence may point to a faulty control board requiring replacement.
How much does it cost to repair a Daewoo refrigerator showing the Co error?
If the code resolves on its own within 30 hours, the cost is nothing. If a temperature sensor is faulty, parts and labor typically range from $75 to $200 depending on the specific sensor and service rates in your area. A control board replacement, if needed, is generally more expensive, often falling in the $150 to $400 range including parts and labor.

Related Daewoo refrigerator codes

All Daewoo refrigerator codes
View all 30 Daewoo refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass