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Error code · Microwave

What E03 Means on a Whirlpool Over-the-Range Microwave: Keypad Report

E03 on a Whirlpool over-the-range microwave, such as model WMH31017HS, WMH32519HZ or WMH53521HZ, means the keypad, also called the user interface, reported a problem to the control board. The cause may be the keypad itself or…

Medium · inspection needed
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Code
E03
Appliance
Microwave
Brand
Whirlpool
Warranty
30-day workmanship

What E03 means

E03 on a Whirlpool over-the-range microwave, such as model WMH31017HS, WMH32519HZ or WMH53521HZ, means the keypad, also called the user interface, reported a problem to the control board. The cause may be the keypad itself or the wiring that links it to the board. You will see E03 in the display and some buttons may stop responding, or the cycle may not start. It names an area to test, not a part already confirmed bad.

Common causes of E03

  • Keypad or user interface
  • Wiring between the keypad and control board
  • Control board input
✓ One safe check you can try

1. Turn off the circuit breaker that feeds the microwave and leave it off for one minute. 2. Turn it on again. 3. Watch the microwave for one minute to see that E03 does not return. 4. Wipe the keypad with a barely damp cloth if it is greasy. 5. Try a short cycle to verify normal operation.

! Why to stop there
  • We test whether the keypad or the wiring is the weak point, since a reset cannot show that.
  • A keypad with a few dead buttons often points to the interface itself, which we confirm by testing.
  • We explain what we find and give a written price before repair.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
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E03E03 questions
What does E03 mean?

The keypad reported a problem to the control board. It may be the keypad or the wiring, and the code alone does not say which.

Why do some buttons not work with E03?

If the keypad is the source, certain pads can stop registering. We check the interface and its connection to see whether the pads or the wiring are the cause.

Can I use the microwave after a reset?

If E03 stays away and buttons respond, yes. If it comes back, stop using the keypad and call us for diagnosis and a written price.

Book a visit

Still seeing E03?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107