What this usually means
Replace batteries if the model uses them and check whether the HVAC breaker and indoor service switch are on.
If the screen went blank when cooling stopped and water is near the indoor unit, a condensate safety may have interrupted the control circuit.
What you can safely check
- Thermostat batteries
- HVAC breaker
- Indoor service switch
- Water near indoor equipment
When to call a professional
Request service when simple power checks do not restore the display or when the screen repeatedly goes blank.
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