Antminer S19 – Temperature Too High (Temp1/Temp2 > 95°C)
over max temp, pcb temp is too high
Critical — Immediate action required
Symptoms
- Miner auto-shuts down or throttles hashrate
- Kernel log shows 'over max temp' warnings
- Fan RPM at maximum but temperature continues rising
- One or more hashboards show temps above 90°C
Step-by-Step Fix
Power off the miner immediately and let it cool for 15 minutes.
Check ambient temperature — ensure room is below 35°C (95°F). Mining rooms should ideally be 15-25°C.
Inspect all fans — verify they are spinning freely and not obstructed. Replace any fans with grinding noises or reduced RPM.
Clean dust from heatsinks and fan intakes using compressed air. Heavy dust buildup is the #1 cause of overheating.
Check thermal paste between ASIC chips and heatsinks. If dried or cracked, clean and reapply quality thermal paste (Arctic MX-4 recommended).
Verify proper airflow — ensure intake and exhaust are not blocked. Maintain 15cm clearance on all sides.
If problem persists after cleaning, the hashboard heatsink contact may be poor — this requires professional reseating.
Related Error Codes
Still Having Issues?
Our team of Bitcoin Mining Hackers has been repairing ASIC miners since 2016. We have seen it all and fixed it all. Get a professional diagnosis.