I think I forgot to answer one of your questions... yes the new replacement thermostats I got .. had the red buttons.
I set the lid of one incubator on the top of another one when adding water one day... didnt realize it but a red button got pushed and the temperature was off for a few hours before I figured out what happened
I set the lid of one incubator on the top of another one when adding water one day... didnt realize it but a red button got pushed and the temperature was off for a few hours before I figured out what happened