Need some ideas from the brain trust on an automation

Configuration
2

This should help you get started.

alias: example
triggers:
  - trigger: template
    value_template: >
      {{ states('sensor.bottom') | float(0) - states('sensor.top') | float(0) > 20 }}
    for:
      minutes: 5
conditions: []
actions:
  - action: notify.whatever
    data:
      title: 'WARNING Overheating detected'
      message: 'Check stove. It may have been left on.'

Reference

Template Trigger

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