Tristar
Tristar Microwaves Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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dE
Microwave displays dE or DE and will not start; often accompanied by a door-open icon.
Door Open Detection Error
E1
Microwave will not start; display shows E1 immediately after pressing START.
Door Interlock Switch Failure
E10
Microwave shows E10 and beeps; clock and basic display work but cooking functions are disabled.
EEPROM / Control Memory Error
E2
Microwave stops shortly after starting and displays E2 on the control panel.
Thermistor / Cavity Temperature Sensor Error
E3
Microwave does not heat and shows E3 after a few seconds of operation.
Magnetron / High-Voltage System Failure
E4
Microwave stops heating mid-cycle and displays E4; unit may feel very hot externally.
Overheat Protection / Thermal Cutout Tripped
E5
Microwave display shows E5 and the turntable and fan do not start when pressing START.
Low Voltage / Power Supply Error
E6
Microwave beeps and shows E6; keypad does not respond or responds erratically.
Keypad / Touch Panel Communication Error
E7
Microwave displays E7 and will not start; interior light may come on but no heating or rotation.
Door Sensing / Monitor Switch Error
E8
Microwave shows E8 and stops heating; fan may continue to run briefly.
Cooling Fan Motor Error
E9
Microwave displays E9 and will not start; interior light and display may still function.
Inverter / Power Module Error (on inverter-equipped models)
F1
Microwave displays F1 and beeps; may occur at power-up or when pressing any key.
Control Board Internal Fault
F2
Microwave shows F2 and may stop mid-cycle; keypad may still respond.
Temperature Sensor Out of Range
F3
Microwave displays F3 and will not start; may be accompanied by fan running briefly.
Magnetron Overcurrent / High-Voltage Fault
F4
Microwave shows F4 and may shut down unexpectedly; display and clock remain on.
Cooling System / Fan Feedback Error
F5
Microwave displays F5 and beeps; cooking functions are disabled.
Relay or Triac Failure on Control Board
H0
Microwave displays H0 or HO and will not start; often appears after a power outage.
Child Lock / Demo Mode Indication (model-dependent)
H1
Microwave displays H1 or HI and stops heating; fan may continue to run.
Cavity Overheat / High Temperature Error
H2
Microwave shows H2 and will not start; may occur immediately on power-up.
Humidity / Steam Sensor Error (sensor-equipped models)
SE
Microwave beeps continuously or intermittently and displays SE; some keys may appear stuck.
Keypad Short / Stuck Key Error
Symptom
Microwave cavity paint is peeling or rust is visible inside the oven.
Cavity Coating Degradation
Symptom
Microwave clock resets or the unit restarts randomly during cooking.
Intermittent Power Loss / Control Reset
Symptom
Microwave display is dim, flickering, or completely blank, but the unit may still heat when buttons are pressed blindly.
Display / VFD or LED Module Failure
Symptom
Microwave does not power on at all; display is blank and no lights or sounds when door is opened or buttons are pressed.
No Power – Main Fuse / Power Input Failure
Symptom
Microwave door is difficult to open or sticks; handle feels like it might break.
Door Latch Mechanism Binding
Symptom
Microwave door will not latch or pops open during cooking.
Door Latch and Hinge Misalignment
Symptom
Microwave emits a high-pitched squeal or chirp from the fan area during operation.
Worn Fan Motor Bearings
Symptom
Microwave emits sparks or arcing inside the cavity during cooking.
Cavity Arcing / Waveguide Contamination
Symptom
Microwave exterior cabinet vibrates excessively or buzzes against surrounding cabinetry during operation.
Cabinet Vibration / Mounting Issue
Symptom
Microwave fan and light run but the timer does not count down; cooking never completes.
Control Timing / Relay Logic Fault
Symptom
Microwave has a strong burning or electrical smell during or after operation.
Overheating Component or Cavity Contamination
Symptom
Microwave interior light does not come on when the door is opened or during cooking, but the unit heats normally.
Interior Cavity Lamp Failure
Symptom
Microwave interior light, fan, and turntable run, but food heats very slowly compared to normal.
Reduced Heating Power – Weak Magnetron or Low Line Voltage
Symptom
Microwave keypad buttons do not respond or require very hard pressing; no error code displayed.
Unresponsive Membrane Keypad
Symptom
Microwave leaks water or condensation onto the counter or inside the door.
Excess Condensation / Door Seal Issue
Symptom
Microwave makes a rattling or scraping noise from the turntable area during operation.
Turntable Support / Roller Ring Problem
Symptom
Microwave runs but does not heat food; turntable and interior light operate normally, no error code displayed.
No Heat – Magnetron / High-Voltage Circuit Failure
Symptom
Microwave runs but makes loud buzzing, humming, or grinding noises during operation.
Abnormal Operating Noise – High-Voltage or Mechanical
Symptom
Microwave runs but the cooling fan does not operate; exterior becomes very hot to the touch.
Cooling Fan Motor Failure
Symptom
Microwave runs with the door open or starts when the door is closed without pressing START.
Door Interlock System Failure (Serious Safety Hazard)
Symptom
Microwave trips the household circuit breaker or blows the house fuse when starting a cook cycle.
Line Short / Overcurrent on Startup
Symptom
Microwave turntable does not rotate, but heating and other functions work normally.
Turntable Drive Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| dE |
Microwave displays dE or DE and will not start; often accompanied by a door-open icon.
|
Door Open Detection Error | View Details |
| E1 |
Microwave will not start; display shows E1 immediately after pressing START.
|
Door Interlock Switch Failure | View Details |
| E10 |
Microwave shows E10 and beeps; clock and basic display work but cooking functions are disabled.
|
EEPROM / Control Memory Error | View Details |
| E2 |
Microwave stops shortly after starting and displays E2 on the control panel.
|
Thermistor / Cavity Temperature Sensor Error | View Details |
| E3 |
Microwave does not heat and shows E3 after a few seconds of operation.
|
Magnetron / High-Voltage System Failure | View Details |
| E4 |
Microwave stops heating mid-cycle and displays E4; unit may feel very hot externally.
|
Overheat Protection / Thermal Cutout Tripped | View Details |
| E5 |
Microwave display shows E5 and the turntable and fan do not start when pressing START.
|
Low Voltage / Power Supply Error | View Details |
| E6 |
Microwave beeps and shows E6; keypad does not respond or responds erratically.
|
Keypad / Touch Panel Communication Error | View Details |
| E7 |
Microwave displays E7 and will not start; interior light may come on but no heating or rotation.
|
Door Sensing / Monitor Switch Error | View Details |
| E8 |
Microwave shows E8 and stops heating; fan may continue to run briefly.
|
Cooling Fan Motor Error | View Details |
| E9 |
Microwave displays E9 and will not start; interior light and display may still function.
|
Inverter / Power Module Error (on inverter-equipped models) | View Details |
| F1 |
Microwave displays F1 and beeps; may occur at power-up or when pressing any key.
|
Control Board Internal Fault | View Details |
| F2 |
Microwave shows F2 and may stop mid-cycle; keypad may still respond.
|
Temperature Sensor Out of Range | View Details |
| F3 |
Microwave displays F3 and will not start; may be accompanied by fan running briefly.
|
Magnetron Overcurrent / High-Voltage Fault | View Details |
| F4 |
Microwave shows F4 and may shut down unexpectedly; display and clock remain on.
|
Cooling System / Fan Feedback Error | View Details |
| F5 |
Microwave displays F5 and beeps; cooking functions are disabled.
|
Relay or Triac Failure on Control Board | View Details |
| H0 |
Microwave displays H0 or HO and will not start; often appears after a power outage.
|
Child Lock / Demo Mode Indication (model-dependent) | View Details |
| H1 |
Microwave displays H1 or HI and stops heating; fan may continue to run.
|
Cavity Overheat / High Temperature Error | View Details |
| H2 |
Microwave shows H2 and will not start; may occur immediately on power-up.
|
Humidity / Steam Sensor Error (sensor-equipped models) | View Details |
| SE |
Microwave beeps continuously or intermittently and displays SE; some keys may appear stuck.
|
Keypad Short / Stuck Key Error | View Details |
| – |
Microwave cavity paint is peeling or rust is visible inside the oven.
|
Cavity Coating Degradation | View Details |
| – |
Microwave clock resets or the unit restarts randomly during cooking.
|
Intermittent Power Loss / Control Reset | View Details |
| – |
Microwave display is dim, flickering, or completely blank, but the unit may still heat when buttons are pressed blindly.
|
Display / VFD or LED Module Failure | View Details |
| – |
Microwave does not power on at all; display is blank and no lights or sounds when door is opened or buttons are pressed.
|
No Power – Main Fuse / Power Input Failure | View Details |
| – |
Microwave door is difficult to open or sticks; handle feels like it might break.
|
Door Latch Mechanism Binding | View Details |
| – |
Microwave door will not latch or pops open during cooking.
|
Door Latch and Hinge Misalignment | View Details |
| – |
Microwave emits a high-pitched squeal or chirp from the fan area during operation.
|
Worn Fan Motor Bearings | View Details |
| – |
Microwave emits sparks or arcing inside the cavity during cooking.
|
Cavity Arcing / Waveguide Contamination | View Details |
| – |
Microwave exterior cabinet vibrates excessively or buzzes against surrounding cabinetry during operation.
|
Cabinet Vibration / Mounting Issue | View Details |
| – |
Microwave fan and light run but the timer does not count down; cooking never completes.
|
Control Timing / Relay Logic Fault | View Details |
| – |
Microwave has a strong burning or electrical smell during or after operation.
|
Overheating Component or Cavity Contamination | View Details |
| – |
Microwave interior light does not come on when the door is opened or during cooking, but the unit heats normally.
|
Interior Cavity Lamp Failure | View Details |
| – |
Microwave interior light, fan, and turntable run, but food heats very slowly compared to normal.
|
Reduced Heating Power – Weak Magnetron or Low Line Voltage | View Details |
| – |
Microwave keypad buttons do not respond or require very hard pressing; no error code displayed.
|
Unresponsive Membrane Keypad | View Details |
| – |
Microwave leaks water or condensation onto the counter or inside the door.
|
Excess Condensation / Door Seal Issue | View Details |
| – |
Microwave makes a rattling or scraping noise from the turntable area during operation.
|
Turntable Support / Roller Ring Problem | View Details |
| – |
Microwave runs but does not heat food; turntable and interior light operate normally, no error code displayed.
|
No Heat – Magnetron / High-Voltage Circuit Failure | View Details |
| – |
Microwave runs but makes loud buzzing, humming, or grinding noises during operation.
|
Abnormal Operating Noise – High-Voltage or Mechanical | View Details |
| – |
Microwave runs but the cooling fan does not operate; exterior becomes very hot to the touch.
|
Cooling Fan Motor Failure | View Details |
| – |
Microwave runs with the door open or starts when the door is closed without pressing START.
|
Door Interlock System Failure (Serious Safety Hazard) | View Details |
| – |
Microwave trips the household circuit breaker or blows the house fuse when starting a cook cycle.
|
Line Short / Overcurrent on Startup | View Details |
| – |
Microwave turntable does not rotate, but heating and other functions work normally.
|
Turntable Drive Failure | View Details |
No matching codes found
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