OK Microwaves Error Codes

E01

Microwave will not start; display works but pressing START does nothing or beeps three times

Door Interlock Safety Circuit Fault

E02

Microwave stops a few seconds after pressing START and displays E02

Door Sensing / Monitor Switch Error

E03

Microwave runs but no heat; E03 appears after a short time

Magnetron / High Voltage System Failure

E04

Microwave stops during cooking and displays E04; may also trip the household breaker

Overcurrent / Short Circuit Protection Trip

E05

Microwave displays E05 and will not start; sometimes appears after a power surge

Control PCB Power Supply Fault

E06

Microwave shows E06 and beeps; keypad does not respond correctly or random buttons activate

Keypad / Touch Panel Communication Error

E07

Microwave displays E07 and stops; internal cooling fan may not run

Magnetron / Cavity Overheat Protection

E08

Microwave shows E08 and will not start; often associated with grill or convection models

Grill / Convection Heater Overheat or Open Circuit

E09

Microwave displays E09; turntable does not rotate during cooking

Turntable Motor Drive Error

E10

Microwave shows E10 and beeps; interior light may stay on even with door closed

Stuck Relay or Control Output Fault

E11

Microwave displays E11; clock and basic functions work but cooking cannot be started

Child Lock / Safety Lock Circuit Error

E12

Microwave shows E12; fan may run briefly then stop; no heating

Inverter Power Module Fault (Inverter Models)

E13

Microwave displays E13; interior light and fan may not operate

Low Voltage Supply or Relay Drive Error

E14

Microwave shows E14; sensor cooking functions do not work

Humidity / Steam Sensor Error

E15

Microwave displays E15; convection fan may not run in convection mode

Convection Fan Motor Fault

E16

Microwave shows E16; interior light and fan may run but no heating occurs intermittently

Intermittent Door Interlock / Safety Chain Fault

E17

Microwave displays E17; loud humming noise when attempting to cook, then stops

High Voltage Transformer Overload / Short Detection

E18

Microwave shows E18; interior light flickers and unit may shut down unexpectedly

Line Voltage / Power Input Error

E19

Microwave displays E19; time counts down but food remains cold

Power Relay / Heating Relay Fault

E20

Microwave shows E20; grill function does not operate but microwave heating is normal

Grill Circuit Control Error

Symptom

Microwave clock resets or unit restarts randomly during cooking

Intermittent Power Loss or Control Reset

Symptom

Microwave convection or grill mode takes very long to reach temperature or does not brown food

Reduced Grill / Convection Heating Performance

Symptom

Microwave display is dim, flickering, or partially missing segments

Display / VFD or LED Driver Fault

Symptom

Microwave display works but START button does not respond; other buttons may work

Partial Keypad / Membrane Failure

Symptom

Microwave does not power on at all; display is blank and no lights or sounds

No Power / Main Fuse or Power Input Failure

Symptom

Microwave door will not close fully; unit will not start

Door Misalignment / Latch Engagement Failure

Symptom

Microwave door will not open or is very hard to open after cooking

Door Latch / Release Mechanism Failure

Symptom

Microwave emits a burning smell or smoke during operation

Overheating Component or Cavity Contamination

Symptom

Microwave fan runs continuously even when not cooking

Stuck Cooling Fan Relay or Overheat Condition

Symptom

Microwave interior light, fan, and turntable run when door is opened

Door Interlock / Monitor Switch Miswiring or Failure

Symptom

Microwave is excessively noisy; rattling, grinding, or scraping sounds

Mechanical Noise from Fan, Turntable, or Cavity Components

Symptom

Microwave keypad is unresponsive; no buttons work but display may be lit

Total Keypad / Control Input Failure

Symptom

Microwave leaks water or condensation onto the counter or inside the door

Condensation Management / Door Seal Issue

Symptom

Microwave light does not turn on, but cooking works normally

Cavity Lamp Failure

Symptom

Microwave makes loud buzzing or humming noise during operation, louder than usual

High Voltage Component Noise / Partial Short

Symptom

Microwave runs but does not heat food; turntable and light work normally

No Heat / High Voltage System Failure

Symptom

Microwave runs for a few seconds then stops with no error code; display remains on

Thermal Cutout or Door Interlock Interruption

Symptom

Microwave sparks inside the cavity during cooking; arcing sounds or bright flashes

Cavity Arcing / Waveguide Contamination or Damage

Symptom

Microwave trips the household circuit breaker or blows fuse when starting

Short Circuit or Inrush Overload

Symptom

Microwave turntable does not rotate, but heating still works

Turntable Drive Failure