mypros+
Error code reference

Daewoo Microwave Error Code ERROR 2

Thermistor fault or heater failure detected during convection/grill operation; thermistor reads 0 ohms or…

Daewoo codesDaewoo microwave codes

Thermistor fault or heater failure detected during convection/grill operation; thermistor reads 0 ohms or infinite (shorted or open), or heater has no continuity.

First step from the service manual

Check continuity of thermistor (resistance should be approx 100K–1000K ohms at room temperature); if thermistor is OK, check continuity of heaters (convection, upper, lower).

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 ERROR 2.

  • 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 ERROR 2 means on a Daewoo microwave

ERROR 2 on a Daewoo microwave signals a thermistor fault or heater failure detected during convection or grill operation. The control board monitors the thermistor, a temperature-sensitive resistor that reports cavity temperature in real time. When the board reads 0 ohms (shorted thermistor) or infinite resistance (open thermistor) instead of the expected range of approximately 100K to 1000K ohms at room temperature, it flags ERROR 2 and halts operation to prevent overheating or unsafe conditions.

If the thermistor tests within spec, the fault may originate in one of the heating elements themselves. Daewoo convection microwaves typically include a convection heater, an upper grill heater, and a lower heater. Any one of these can develop an open circuit due to burned-out coils or failed connections, resulting in no continuity and triggering the same error. The board cannot confirm proper heating behavior and shuts down the cooking cycle.

Common root causes include age-related thermistor degradation, heat stress cracking the thermistor body or its wiring harness, and heater element burnout from repeated high-temperature cycling. Connector corrosion or a broken wire between the thermistor and the control board can also produce a false open-circuit reading without the thermistor itself being defective. Accurate diagnosis requires an ohmmeter check of the thermistor first, followed by continuity testing of each heater individually.

Source: manufacturer service documentation.

Common causes of ERROR 2

  1. 01

    Failed or out-of-range thermistor

    Part replacement

    The thermistor has shorted to 0 ohms or gone open to infinite resistance, both outside the expected 100K to 1000K ohm range at room temperature. Test it with an ohmmeter; a reading at either extreme confirms replacement is needed.

  2. 02

    Open convection heater element

    Part replacement

    The convection heater coil has burned out, producing no continuity when tested. This is common after extended high-temperature use and requires element replacement.

  3. 03

    Open upper or lower grill heater

    Part replacement

    Either the upper or lower grill heating element has failed open, causing the board to detect no circuit continuity. Test each heater separately with a continuity meter to isolate which element has failed.

  4. 04

    Damaged wiring harness or connectors

    Wiring / connection

    A broken wire or corroded connector between the thermistor and the control board can mimic an open thermistor reading without the component itself being faulty. Inspect the harness visually and check each connector for oxidation or loose pins.

  5. 05

    Control board fault

    Part replacement

    If the thermistor and all heater elements test within spec and all wiring checks out, the control board itself may be misreading the circuit. This is the least common cause and should be diagnosed only after all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about ERROR 2

What does ERROR 2 mean on a Daewoo microwave?
ERROR 2 indicates the control board has detected a fault in the thermistor or one of the heating elements during convection or grill operation. The thermistor, which monitors cavity temperature, may be reading 0 ohms (shorted) or infinite resistance (open) instead of the normal 100K to 1000K ohm range. Alternatively, one of the convection, upper, or lower heater elements may have lost continuity. The microwave halts operation automatically when this condition is detected.
Can I fix ERROR 2 on my Daewoo microwave myself?
A knowledgeable DIYer can perform the diagnostic steps using a multimeter: check the thermistor resistance and then test each heater for continuity. If a faulty component is identified, replacing a thermistor or heater element is within reach for someone comfortable working on appliances. However, microwave capacitors can store a lethal charge even when unplugged, so discharge the capacitor before touching any internal components.
Is it safe to keep using my Daewoo microwave when ERROR 2 appears?
No, you should stop using the microwave until the fault is resolved. ERROR 2 means the appliance cannot confirm proper temperature sensing or heating circuit function during convection or grill modes. Continuing to operate it risks uncontrolled overheating. The microwave's convection and grill functions will not work correctly until the defective component is replaced.
Will resetting the microwave clear the ERROR 2 code?
Unplugging the microwave and restoring power may temporarily clear the display, but ERROR 2 will return as soon as the appliance attempts convection or grill operation and the board re-detects the fault. A reset does not repair the underlying component failure. Permanent resolution requires identifying and replacing the faulty thermistor or heater element.
How much does it cost to repair ERROR 2 on a Daewoo microwave?
Repair costs vary depending on which component has failed. A replacement thermistor typically runs in the range of $10 to $30 for the part alone, while heater elements can range from $20 to $60 depending on the specific model. If professional labor is involved, expect total repair costs in the range of $80 to $180. If the control board is the cause, costs will be higher and may approach or exceed the value of an older unit.

Related Daewoo microwave codes

All Daewoo microwave codes

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

Get Started

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