Dacor Microwave SE Error: Stuck key / keypad error
This dacor microwave se error code guide explains what this fault means for your Dacor appliance and how to respond safely. What SE Means on a Dacor Microwave The SE error code on Dacor microwave models including the DMW2420 and DMR30 indicates a stuck key or shorted keypad. The control board detects a button that […]
~20%
DIY Fixable
From $200
Typical Repair Cost
30-60 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A sensor error indicates unreliable cooking feedback. Food may be undercooked or overheated.
Can I reset the code?
Yes. Cleaning the sensor area and power cycling may resolve SE. Persistent faults need sensor replacement.
When to stop immediately?
Stop if you notice: SE returns immediately after cleaning and power reset, Microwave starts on its own without any user input.
Symptoms You May Notice
Keypad buttons trigger wrong functions
Pressing one button activates a different function — for example, pressing 5 enters 8, or pressing Start activates the clock set mode.
Continuous beeping from the control panel
The microwave emits a steady or pulsing beep that cannot be stopped by pressing buttons, because a shorted keypad trace sends a permanent signal to the board.
Microwave starts on its own without user input
The unit begins a cooking cycle without anyone pressing Start, because a short in the membrane keypad sends a phantom start command. This is a safety concern.
Display shows SE and all buttons are unresponsive
The SE code appears and the control panel locks out all functions. No amount of button pressing changes the display or clears the code.
Possible Causes
Membrane keypad short circuit from moisture
Liquid or steam has penetrated the membrane keypad layers, creating a conductive bridge between circuit traces. This is common on DMW2420 models mounted above a range.
DIY PossibleDegraded keypad overlay adhesive
Heat from the cooktop below (on over-the-range models) has degraded the adhesive layer in the membrane keypad, allowing the contact layers to touch permanently.
Requires ProfessionalSafe Checks You Can Do
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1
Unplug immediately if unit starts on its own
If the microwave activates without user input, unplug it or turn off the breaker immediately. A self-starting microwave is a safety hazard and must not be used until repaired.
The monitor interlock should prevent magnetron operation with the door open, but a shorted keypad combined with a closed door can result in unattended operation.
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2
Power cycle to attempt a reset
Unplug the microwave for 5 minutes, then restore power. If SE reappears immediately without touching any buttons, the keypad membrane has a permanent short.
If SE only appears after the panel warms up from cooktop heat below, the keypad adhesive is the likely cause. Consider adding ventilation space between the cooktop and microwave.
When to Call a Professional
Contact a qualified technician if:
- Keypad membrane shows visible bubbling, cracking, or moisture intrusion
- SE persists after two power-cycle attempts and panel cleaning
- Control panel assembly replacement required for persistent short
Need Professional Help?
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