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Error code reference

Daewoo Washer Error Code H6

Heater wash error

Daewoo codesDaewoo washer codes

Heater wash error - the heater wash does not work (water temperature does not rise over 2 degrees C during 15 minutes).

First step from the service manual

Change the heater wash.

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

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What H6 means on a Daewoo washer

The H6 error code on a Daewoo washer indicates a heater wash failure. Specifically, the control system monitors water temperature during the wash cycle and triggers this fault when the water temperature fails to rise by more than 2 degrees Celsius within a 15-minute window. This tells the machine that the heating element responsible for warming wash water is not functioning as expected, and the cycle cannot proceed under the required thermal conditions.

The wash heater is a submersible heating element located at the bottom of the wash tub. It draws significant current and relies on both a functional heating element and proper electrical connections to operate. When the heater fails, it can be due to a burned-out element, a failed thermal cutout fuse on the heater assembly, or a break in the wiring harness that supplies power to it. In some cases, a faulty temperature sensor (NTC thermistor) may incorrectly report no temperature rise even when the heater is partially functional, though a completely failed element is the most common culprit.

Because the diagnostic guidance points directly to replacing the wash heater as the first step, a technician should begin by disconnecting power, accessing the heater assembly, and testing the element for continuity and correct resistance. A heater element that shows open continuity (infinite resistance) is confirmed faulty and requires replacement. The wiring harness and control board relay that supply power to the heater should also be inspected for damage or corrosion before completing the repair.

Source: manufacturer service documentation.

Common causes of H6

  1. 01

    Failed heating element

    Part replacement

    The wash heater element itself has burned out, showing open continuity when tested with a multimeter. This is the most common cause and is why replacement of the heater is listed as the first diagnostic step.

  2. 02

    Thermal cutout fuse blown

    Part replacement

    Many heater assemblies include a thermal safety fuse that will blow if the element overheats. A blown cutout will interrupt power to the heater even if the element itself is intact.

  3. 03

    Faulty NTC temperature sensor

    Part replacement

    If the NTC thermistor that monitors water temperature is reading incorrectly, the control board may not detect any rise in temperature even when the heater is working. Testing the sensor resistance at a known temperature can confirm this fault.

  4. 04

    Damaged or disconnected wiring harness

    Wiring / connection

    Broken, corroded, or loose wiring connections between the control board and the heater can prevent power from reaching the element. Visually inspect the harness and check for continuity along the heater supply circuit.

  5. 05

    Control board relay failure

    Part replacement

    The control board uses a relay to switch power to the heater. If that relay has failed open, the heater will never receive power regardless of the condition of the element itself.

See the test procedure for each cause

Frequently asked questions about H6

What does H6 mean on a Daewoo washer?
H6 on a Daewoo washer is a heater wash error. It means the machine monitored water temperature during the wash cycle and found that the water did not rise by more than 2 degrees Celsius over a 15-minute period. This indicates the wash heating element is not functioning properly and the washer will not complete a heated wash cycle until the issue is resolved.
Can I fix the H6 error myself?
A knowledgeable DIYer with basic electrical skills can attempt this repair. The first step is to disconnect power to the washer, access the heater assembly, and test the element for continuity using a multimeter. If the element shows no continuity, it needs to be replaced. However, if the wiring or control board relay is involved, diagnosis becomes more complex and a professional technician may be needed.
Is it safe to keep using my Daewoo washer when H6 is displayed?
Running the washer while the H6 error is active is not recommended. The machine cannot heat the water properly, so wash performance will be significantly reduced. In addition, continuing to run cycles with a faulty heater circuit could place additional stress on other electrical components in the machine.
How much does it cost to fix the H6 error on a Daewoo washer?
If the heating element itself is the cause, parts typically cost in the range of $20 to $60 depending on the model and supplier. Adding professional labor, total repair costs generally fall between $80 and $200. If the control board relay or board assembly is at fault, costs can be higher, often in the $150 to $350 range including parts and labor.
Will resetting my Daewoo washer clear the H6 error code?
Resetting the washer by unplugging it for a few minutes may temporarily clear the H6 code, but the error will return as soon as the machine attempts to heat water again and fails. The underlying fault in the heater circuit must be diagnosed and repaired for the code to be permanently resolved.

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