Door seals dirty/failing, letting air in and raising the temperature. The "beep" is a warning of that rising temperature.
Clean seals thoroughly, spray with silicone and wipe down again.
If that doesn't work Google the Manufacturer and enquire about buying a new door seal.
Do you remember how you took them out?
It is not usually hard too snap them back together.
Just put the support beam back in and the top shelve.
Align your baskets in the grooves.
You can seal off those lines going around the door that's called the Yoder Loop. but as far as the class action lawsuit or getting Amana or Whirlpool to pay for the anything good luck. There are very few success stories there.