Maytag Microwave Error Code E21: Meaning and Fix
Reading the microwave display
On a microwave the code replaces the clock on the display. Unplug the unit for a minute to see if it clears, and note the code before you do. Maytag shares the Whirlpool pairing: read the first group, then the sub-code that follows it.
Maytag appliances are built by Whirlpool Corporation on shared platforms, which is why Maytag codes often match Whirlpool ones. Maytag washers, dryers and ranges commonly show F-codes with an E sub-code, or flashing keypad lights. The codes apply to model numbers such as MDB7600AWB, MDB7600AWW and PYE2300AYW; check the label on your unit to confirm yours.
What causes E21
- Sensor has drifted, opened or shorted out
- Thermal fuse or high-limit device has tripped
- Airflow restriction made the appliance run hotter than it should
- Sensor harness is loose, pinched or corroded at the connector
- Control board is misreading the sensor signal
How to fix it
- Cycle the power: unplug the microwave (or switch off its breaker) for one minute, restore power and test it briefly with a cup of water.
- Before opening any panel, switch off the breaker or unplug the appliance; this circuit can carry line voltage.
- Power the unit down and let it cool, then clear any vent, filter or airflow restriction before re-testing.
- Locate the sensor named in the code and check that it is seated, undamaged and connected.
- With the connector unplugged, measure the sensor resistance with a multimeter and compare it to the chart for the model; an open or shorted reading means the sensor is bad.
- Replace the sensor (or thermal fuse) if it fails the test, then run a short cycle to confirm the code stays away.
- Run a full short cycle or function again and confirm the code stays gone before putting the appliance back into normal use.
Parts you may need
| Part | Part no. | Buy |
|---|---|---|
| Fuse Thrml | W11707984 | Find part |
Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.
Questions
What does E21 mean on a Maytag microwave?
It is a fault code from the Maytag control. It indicates a problem with a temperature sensor. A power reset is the first thing to try.
Can I keep using the microwave while it shows E21?
You can try it after a power reset. If the code returns, the affected function may not run properly, so it is worth fixing soon before it causes a bigger failure.
Do I need a technician to clear E21?
Many owners can fix it themselves. Start with the reset and the inspection steps, and only call a technician if the part tests bad and you do not want to replace it.
Other Maytag microwave codes
Sources
Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.
Applies to models including MMV4205BAW, MMV4205BAS, MMV5000ADW, MMV4205BAB, CMV1000ADW, MMV1153AAW, MMV4205AAS, MMV5156AAS.