Device: iPhone 15 Pro Max
OS Version: iOS 27.0.1
Hi everyone,
My iPhone 15 Pro Max has started showing a recurring, false temperature warning: "Temperature: iPhone needs to cool down before you can use it." after I upgraded to iOS 27.
Key observations:
- Frequency: The warning appears almost every time I pick up or unlock the phone, and it interrupts active tasks and phone becomes completely unusable during warning.
- Duration: The lockout screen persists for about 30–40 seconds each time before clearing.
- Physical condition: The phone itself is physically cool to the touch. Ambient room temperature is completely moderate (~29°C–30°C).
- Troubleshooting performed: I updated to the latest patch release (iOS 27.0.1) and performed hard restarts, but the behavior persists without change.
Since the device is not physically hot, this appears to be a failing internal thermal sensor or a sensor communication bug rather than true thermal throttling.
Has anyone else experienced this false thermal lockout on the 15 Pro Max after iOS 27.0.1, and did it require a hardware repair (such as a port/sensor flex replacement) or a DFU restore? Any insights would be appreciated.
