Grand Master Reg reads us the keypad dance:

Follow procedure below to use the quick test mode.

Entries must be made within 32 seconds of each other or the control will exit the quick test mode.

1. Press and hold CANCEL and BROIL pads for 3 seconds.

2. Once the control has entered the “Quick Test” mode, release both pads.

3. Press the AUTOSET button ..... Steps through last 5 diagnostic codes

Source: Maytag electric double wall oven MEW6630DDS is only beeping and not functioning