Maytag wall oven is non-responsive after power outage.

SOURCE: Maytag gas oven

if your clock and broiler work then you need to replace the lower oven ignighter remove the oven racks then the bottom plate of the oven its easy then the flame spreader after that you will see a burner bar at the back of that will be the ignighter and just because it glowes dont mean its good just replace it

SOURCE: Need to unlock Sabbath mode

I have a Crosley gas oven and I had the same problem. According to my manuel it will shut off automatically after 72 hours OR Press the CLOCK pad for 5 seconds - no beep will sound. The Sab will flash and then the time will be displayed.
I hope this helps.

SOURCE: Sabbath display makes oven inoperable

Hold the clock button "in" for 5 seconds to disable Sabbath mode.

SOURCE: my maytag gemini oven has been stuck in sabbath

Hello,

This is from the Maytag website it explains how to cancel the sabbath mode;

To cancel the Sabbath Mode:
Press the Clock pad for three seconds.
Or
After 72 hours, the Sabbath Mode will end.

• "SAb" will flash for five seconds.
• The time of day will return to the display.

• Sabbath Mode can be turned on at any time with or without the oven on.
• Sabbath Mode cannot be turned on if the keypads are locked out or when the door is locked.
• Most prompts and messages and all beeps are deactivated when Sabbath Mode is active.
• If the oven is baking when Sabbath Mode is set, the Bake icon will go out at the end of the baking cycle. There will be no audible beeps.
• If the oven light is desired while in Sabbath Mode, it must be turned on before the Sabbath Mode is started.
• When the Sabbath Mode is started, the temperature display will immediately show the set temperature, rather than the actual oven cavity temperature. No preheat beep will sound.
• The self-clean cycle and automatic door lock do not operate during the Sabbath Mode.
• Pressing the Cancel pad will cancel a Bake cycle, however the control will stay in the Sabbath Mode.
• If power fails, the oven will power up in Sabbath Mode with 72 hours remaining and no cycle active.