Hamilton Beach Microwaves Error Codes

dE

Microwave displays dE or "door" and refuses to start; sometimes clears when door is slammed.

Door Not Detected / Door Switch Misalignment

E1

Microwave beeps and displays E1 shortly after pressing START; cooking does not begin.

Keypad or Control Panel Communication Error

E2

Microwave displays E2 and will not start heating; sometimes appears after several minutes of use.

Temperature Sensor / Thermistor Error

E3

Microwave shows E3 and stops heating; fan and light may still operate.

Magnetron Overheat or Thermal Cutout Fault

E4

Microwave displays E4 and will not start; sometimes appears immediately after pressing START.

Door Switch / Interlock System Error

E5

Microwave shows E5 and stops heating; display and timer may still function.

High Voltage System Fault (Magnetron/Transformer/Capacitor)

E6

Microwave displays E6 and keypad becomes unresponsive or partially responsive.

Keypad Matrix or Touch Controller Failure

E7

Microwave shows E7 and may shut down mid-cycle; cooling fan may run at high speed.

Overheat Protection / Exhaust Sensor Error

E8

Microwave displays E8 and does not heat; sometimes accompanied by unusual humming.

Inverter or Power Supply Fault (for inverter-based models)

E9

Microwave shows E9 and will not start; interior light and display may still work.

Relay or Power Control Failure

H0

Microwave displays H0 or "H0t" and will not start a new cycle immediately after heavy use.

Cavity Overheat / Thermal Protection Active

LOC

Microwave displays LOC or a lock icon; keypad does not respond to cooking commands.

Child Lock / Control Lock Activated

PF

Microwave displays PF or "Power Failure" after an outage or brief power interruption.

Power Interruption / Brownout Detection

SE

Microwave displays SE or "SENSOR" error during sensor cook or reheat cycles; cooking stops.

Humidity / Steam Sensor Error

Symptom

Microwave cavity paint is peeling or rust is visible inside.

Cavity Coating Degradation

Symptom

Microwave clock and settings reset randomly or the unit restarts during cooking.

Intermittent Power or Control Board Fault

Symptom

Microwave display is dim, flickering, or some segments are missing.

Display Module or Control Board Failure

Symptom

Microwave display works, but pressing START does nothing; no relay click, no fan, no light change.

No Start – Control or Door Interlock Issue

Symptom

Microwave does not start at all; display is blank and no lights or sounds when door is opened.

No Power – Dead Microwave

Symptom

Microwave door will not open or is very difficult to open after cooking.

Door Latch or Release Mechanism Jammed

Symptom

Microwave door will not stay closed or pops open during cooking.

Door Latch Engagement Failure

Symptom

Microwave emits a burning smell or visible smoke from the cavity during or after cooking.

Burnt Food Residue or Component Overheating

Symptom

Microwave fan runs loudly or continuously even when not cooking (beyond normal cool-down period).

Cooling Fan or Control Logic Issue

Symptom

Microwave heats, but much more slowly than normal; cook times must be doubled or tripled.

Reduced Microwave Output

Symptom

Microwave interior light and fan work, but turntable and heating stop intermittently during a cycle.

Intermittent High-Voltage or Turntable Control

Symptom

Microwave interior light does not come on when door opens or during cooking, but unit heats normally.

Cavity Lamp Failure

Symptom

Microwave interior light stays on even when the door is closed and not cooking.

Stuck Door Switch or Control Relay

Symptom

Microwave keypad buttons are unresponsive or require very hard presses to register.

Membrane Keypad Wear or Failure

Symptom

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

Excess Condensation / Door Seal Issue

Symptom

Microwave light, fan, and turntable run when door is closed, even without pressing START.

Door Switch / Interlock Shorted Closed

Symptom

Microwave makes a rattling or grinding noise when the turntable rotates.

Turntable Mechanical Noise

Symptom

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

Excessive Noise – High Voltage or Mechanical

Symptom

Microwave produces visible sparks or arcing inside the cavity during cooking.

Cavity Arcing / Waveguide Contamination

Symptom

Microwave runs (light and turntable on, fan running) but food does not heat at all.

No Heat – High Voltage System Failure

Symptom

Microwave runs for a few seconds then shuts off completely; display may reset or show time again.

Intermittent Power Loss or Overcurrent Shutdown

Symptom

Microwave trips the household circuit breaker or blows a fuse when starting a cook cycle.

Short Circuit or Overcurrent on Startup

Symptom

Microwave turntable does not rotate during cooking, but heating still works.

Turntable Drive Failure