Westinghouse Microwaves Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Microwave will not start; display shows E01 immediately after pressing START.
Door Interlock System Fault
E02
Microwave stops heating shortly after start; display shows E02 and may beep repeatedly.
Overheat / Thermal Cutout Trip
E03
Microwave runs but does not heat; display shows E03 after a few seconds of operation.
Magnetron / High Voltage System Fault
E04
Microwave display shows E04 and unit will not start; sometimes accompanied by a loud relay click and immediate stop.
Inverter / Power Supply Fault (on inverter models)
E05
Microwave beeps and shows E05; cooking stops unexpectedly, often after a short time.
Cavity Temperature Sensor / Thermistor Fault
E06
Microwave display shows E06 and the turntable does not rotate; unit may still heat.
Turntable Motor / Position Sensor Fault
E07
Microwave shows E07 and will not start; keypad and display otherwise appear normal.
Keypad / Touch Control Panel Fault
E08
Microwave shows E08 and may run the fan or light unexpectedly; cooking functions disabled.
Stuck Relay / Power Control Fault
E09
Microwave displays E09 and beeps; clock and basic functions may still work but cooking is disabled.
Low Line Voltage / Power Input Error
E10
Microwave shows E10 and the interior light does not turn on when the door opens; unit may not start.
Door Sensing Circuit Fault
E11
Microwave shows E11 and the exhaust fan on an over-the-range model does not operate correctly.
Exhaust Fan Motor / Feedback Fault
E12
Microwave shows E12 and the interior light remains on even when the door is closed; unit may refuse to start.
Door Interlock Monitor Circuit Error
E13
Microwave shows E13 and sensor cooking functions (e.g., auto reheat) do not work properly.
Humidity / Steam Sensor Fault
E14
Microwave shows E14 and the clock resets intermittently or the unit shuts off randomly.
Internal Power Supply / Control Board Fault
E15
Microwave shows E15 and the child lock feature cannot be disabled or behaves erratically.
Control Lock / Software Logic Fault
E16
Microwave shows E16 and convection or grill functions (on combo models) do not operate.
Convection Heater / Fan Fault
E17
Microwave shows E17 and makes a loud humming noise without heating.
High-Voltage Transformer Overload / Short
E18
Microwave shows E18 and the display is dim, flickering, or partially blank.
Display / VFD Power Fault
E19
Microwave shows E19 and emits a continuous beeping or alarm tone.
Buzzer / Alarm Circuit Fault
E20
Microwave shows E20 and the unit will not respond to any keypad input.
Control CPU / Firmware Fault
Symptom
Microwave cavity paint is peeling or rust is visible inside.
Cavity Coating Degradation
Symptom
Microwave clock and display reset randomly or flicker when cooking starts.
Power Supply Sag / Loose Connection
Symptom
Microwave display is on but the START button does nothing; timer does not count down.
Start Circuit / Control Logic Fault
Symptom
Microwave does not power on at all; display is blank and unit appears dead.
No Power – Primary Power Circuit Failure
Symptom
Microwave door will not open or is very difficult to open after cooking.
Door Latch / Release Mechanism Failure
Symptom
Microwave door will not stay closed or pops open during cooking.
Door Latch Misalignment / Weak Spring
Symptom
Microwave emits sparks or arcing inside the cavity during cooking.
Cavity Arcing / Waveguide Contamination
Symptom
Microwave fan runs loudly or vibrates excessively during operation.
Cooling Fan Imbalance / Wear
Symptom
Microwave has a burning smell or smoke during operation.
Overheating Component or Food Residue Burning
Symptom
Microwave interior light does not turn on, but the unit heats and otherwise works normally.
Interior Light Circuit Failure
Symptom
Microwave interior light, fan, and turntable run when the door is closed, even without pressing START.
Door Interlock Miswiring / Stuck Relay
Symptom
Microwave keypad buttons are unresponsive or only some keys work intermittently.
Keypad / Membrane Failure
Symptom
Microwave leaks steam or moisture around the door and control panel during cooking.
Door Seal / Venting Issue
Symptom
Microwave light and fan work, but unit stops after a few seconds of cooking with no error code.
Thermal Protection Trip / Intermittent Power Loss
Symptom
Microwave produces a strong chemical or plastic smell when new or after long storage.
Initial Burn-in Odor / Residual Manufacturing Oils
Symptom
Microwave runs but does not heat; no error code displayed.
No Heat – High Voltage System Failure
Symptom
Microwave runs but makes loud buzzing, grinding, or rattling noises during operation.
Abnormal Operating Noise
Symptom
Microwave trips the household circuit breaker or blows a fuse when starting.
Short Circuit / Overcurrent on Startup
Symptom
Microwave turntable does not rotate, but heating still occurs.
Turntable Drive Failure
Symptom
Over-the-range microwave exhaust fan does not vent properly or airflow is weak.
Ventilation / Ducting Problem
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Microwave will not start; display shows E01 immediately after pressing START.
|
Door Interlock System Fault | View Details |
| E02 |
Microwave stops heating shortly after start; display shows E02 and may beep repeatedly.
|
Overheat / Thermal Cutout Trip | View Details |
| E03 |
Microwave runs but does not heat; display shows E03 after a few seconds of operation.
|
Magnetron / High Voltage System Fault | View Details |
| E04 |
Microwave display shows E04 and unit will not start; sometimes accompanied by a loud relay click and immediate stop.
|
Inverter / Power Supply Fault (on inverter models) | View Details |
| E05 |
Microwave beeps and shows E05; cooking stops unexpectedly, often after a short time.
|
Cavity Temperature Sensor / Thermistor Fault | View Details |
| E06 |
Microwave display shows E06 and the turntable does not rotate; unit may still heat.
|
Turntable Motor / Position Sensor Fault | View Details |
| E07 |
Microwave shows E07 and will not start; keypad and display otherwise appear normal.
|
Keypad / Touch Control Panel Fault | View Details |
| E08 |
Microwave shows E08 and may run the fan or light unexpectedly; cooking functions disabled.
|
Stuck Relay / Power Control Fault | View Details |
| E09 |
Microwave displays E09 and beeps; clock and basic functions may still work but cooking is disabled.
|
Low Line Voltage / Power Input Error | View Details |
| E10 |
Microwave shows E10 and the interior light does not turn on when the door opens; unit may not start.
|
Door Sensing Circuit Fault | View Details |
| E11 |
Microwave shows E11 and the exhaust fan on an over-the-range model does not operate correctly.
|
Exhaust Fan Motor / Feedback Fault | View Details |
| E12 |
Microwave shows E12 and the interior light remains on even when the door is closed; unit may refuse to start.
|
Door Interlock Monitor Circuit Error | View Details |
| E13 |
Microwave shows E13 and sensor cooking functions (e.g., auto reheat) do not work properly.
|
Humidity / Steam Sensor Fault | View Details |
| E14 |
Microwave shows E14 and the clock resets intermittently or the unit shuts off randomly.
|
Internal Power Supply / Control Board Fault | View Details |
| E15 |
Microwave shows E15 and the child lock feature cannot be disabled or behaves erratically.
|
Control Lock / Software Logic Fault | View Details |
| E16 |
Microwave shows E16 and convection or grill functions (on combo models) do not operate.
|
Convection Heater / Fan Fault | View Details |
| E17 |
Microwave shows E17 and makes a loud humming noise without heating.
|
High-Voltage Transformer Overload / Short | View Details |
| E18 |
Microwave shows E18 and the display is dim, flickering, or partially blank.
|
Display / VFD Power Fault | View Details |
| E19 |
Microwave shows E19 and emits a continuous beeping or alarm tone.
|
Buzzer / Alarm Circuit Fault | View Details |
| E20 |
Microwave shows E20 and the unit will not respond to any keypad input.
|
Control CPU / Firmware Fault | View Details |
| – |
Microwave cavity paint is peeling or rust is visible inside.
|
Cavity Coating Degradation | View Details |
| – |
Microwave clock and display reset randomly or flicker when cooking starts.
|
Power Supply Sag / Loose Connection | View Details |
| – |
Microwave display is on but the START button does nothing; timer does not count down.
|
Start Circuit / Control Logic Fault | View Details |
| – |
Microwave does not power on at all; display is blank and unit appears dead.
|
No Power – Primary Power Circuit Failure | View Details |
| – |
Microwave door will not open or is very difficult to open after cooking.
|
Door Latch / Release Mechanism Failure | View Details |
| – |
Microwave door will not stay closed or pops open during cooking.
|
Door Latch Misalignment / Weak Spring | View Details |
| – |
Microwave emits sparks or arcing inside the cavity during cooking.
|
Cavity Arcing / Waveguide Contamination | View Details |
| – |
Microwave fan runs loudly or vibrates excessively during operation.
|
Cooling Fan Imbalance / Wear | View Details |
| – |
Microwave has a burning smell or smoke during operation.
|
Overheating Component or Food Residue Burning | View Details |
| – |
Microwave interior light does not turn on, but the unit heats and otherwise works normally.
|
Interior Light Circuit Failure | View Details |
| – |
Microwave interior light, fan, and turntable run when the door is closed, even without pressing START.
|
Door Interlock Miswiring / Stuck Relay | View Details |
| – |
Microwave keypad buttons are unresponsive or only some keys work intermittently.
|
Keypad / Membrane Failure | View Details |
| – |
Microwave leaks steam or moisture around the door and control panel during cooking.
|
Door Seal / Venting Issue | View Details |
| – |
Microwave light and fan work, but unit stops after a few seconds of cooking with no error code.
|
Thermal Protection Trip / Intermittent Power Loss | View Details |
| – |
Microwave produces a strong chemical or plastic smell when new or after long storage.
|
Initial Burn-in Odor / Residual Manufacturing Oils | View Details |
| – |
Microwave runs but does not heat; no error code displayed.
|
No Heat – High Voltage System Failure | View Details |
| – |
Microwave runs but makes loud buzzing, grinding, or rattling noises during operation.
|
Abnormal Operating Noise | View Details |
| – |
Microwave trips the household circuit breaker or blows a fuse when starting.
|
Short Circuit / Overcurrent on Startup | View Details |
| – |
Microwave turntable does not rotate, but heating still occurs.
|
Turntable Drive Failure | View Details |
| – |
Over-the-range microwave exhaust fan does not vent properly or airflow is weak.
|
Ventilation / Ducting Problem | View Details |
No matching codes found
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