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iPhone Temperature Warning: Thresholds, Causes, and Practical Solutions

Published the 29.08.2025

IPHONE TEMPERATURE WARNING: THRESHOLDS, CAUSES AND SOLUTIONS

If your iPhone displays the “High Temperature” message, it doesn’t mean there is a defect. It is Apple’s built-in protection system to safeguard battery, CPU and display.

Internal activation thresholds

Internal temperature Device behavior
40–45 °C Device may slow down, screen brightness reduced.
50 °C+ High temperature warning; charging and flash disabled.
60 °C+ Automatic shutdown to prevent permanent damage.

Common causes

  • Charging under load: battery can exceed 45 °C.
  • Gaming, video, 5G: CPU/GPU can reach over 50 °C.
  • Hot environment: in a car under the sun, temp can exceed 50 °C in minutes.
  • Thick cases: trap heat and slow cooling.

Practical tips

  • Use iPhone in environments between 0–35°C.
  • Avoid heavy apps while charging.
  • Remove thick cases during gaming or long use.
  • Never leave iPhone in direct sunlight or inside hot cars.

FAQ

Is the warning a defect?
No, it’s a normal safety protection.

How to prevent shutdown at 60°C?
Avoid intensive use in hot environments, allow cooling breaks.

What if the iPhone shuts down?
Wait until it cools to ambient temperature before restarting.

Related articles

See also: Display refresh rate and LTPS/OLED overheating

Need advice on iPhone thermal behavior? Contact Componenti Digitali for the best display solutions.

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