MacBook Pro 2019 – SSD Overheating & Full Speed Fan Issue
Hello everyone,
I am using a MacBook Pro 15-inch 2019 (Intel, T2 chip model).
Recently, I am facing a serious issue related to SSD temperature and fan behavior.
🔴 Main Problem:
- SSD temperature constantly shows 86°C
- Even when the laptop is idle, the temperature does not change.
- When I physically touch the bottom case, it does NOT feel hot.
- On startup, the cooling fan immediately runs at full speed (~4500 RPM or more).
- Fan continues running loudly even when no heavy applications are open.
It appears that the system believes the SSD is overheating, but there is no actual heat.
🛠 What I Have Already Tried:
- ✅ SMC Reset (Correct T2 method – Right Shift + Left Option + Left Control + Power)
- ✅ NVRAM Reset
- ✅ macOS Reinstallation
- ✅ DFU Restore (Firmware reinstalled)
- ✅ Checked using Macs Fan Control
Even after all these steps:
- SSD temperature still shows fixed at 86°C
- Fan still runs at high speed
- No real overheating observed physically
🔎 My Observation:
It looks like either:
- SSD temperature sensor malfunction
- Sensor communication issue
- T2 chip firmware-related problem
- Or motherboard sensor line fault
❓ My Request:
If anyone has faced a similar issue with the 2019 MacBook Pro model,
please let me know:
- Is this a known SSD sensor failure?
- Can this be fixed without replacing the entire logic board?
- Is there any software-level calibration fix available?
Any technical guidance would be greatly appreciated.
Thank you.
MacBook Pro 15″, macOS 15.7
