ERR_FAN_SPEED
Critical
Antminer S21 – Fan Speed Error
fan speed error
Critical — Immediate action required
Affected Models:
Antminer S21
Symptoms
- Fan RPM reads 0 in dashboard
- Miner stops hashing
- Temperature rises rapidly
Step-by-Step Fix
1
Identify the failed fan via web interface or LED indicators.
2
Power off and reseat fan connector.
3
If fan does not spin, replace with compatible replacement.
4
Power on and verify all fan RPMs are normal.
Related Error Codes
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