MicroBT Troubleshooting Guide

112 error codes and fixes for MicroBT ASIC miners.

Manufacturer

Severity

DIY Difficulty

112 results

Whatsminer Error 301 – Hashboard SM1 Temperature Sensor Failure

All three-hashboard MicroBT air-cooled generations: Whatsminer M20S, M21S, M30S, M30S+, M30S++, M31S,...

Whatsminer Error 300 – Hashboard SM0 Temperature Sensor Failure

Whatsminer M20S, M30S, M30S+, M30S++, M31S, M31S+, M32, M50, M50S, M50S+, M60...

Whatsminer Error 233-238 – PSU Output Protection Triggered

Whatsminer air-cooled M30S, M30S+, M30S++, M31S, M31S+, M32, M50, M50S, M50S+, M50S++,...

Whatsminer Error 200 – Power Probing Error No Power Found

Whatsminer M20S, M30S, M30S+, M30S++, M31S, M31S+, M32, M50, M50S, M50S+, M50S++,...

Whatsminer Error 130 / 131 – Fan Speed Below 3000 RPM

Whatsminer M30S++, M50S/M50S+/M50S++, M53S+, M56S, M60/M60S/M60S+, M63/M63S+, M66/M66S — the higher-tier BTMiner...

Whatsminer Error 120 / 121 – Fan Speed Below 2000 RPM

All air-cooled MicroBT Whatsminer models running BTMiner firmware: M20S, M21S, M30S, M30S+,...

Whatsminer Error 111 – Fanout Detect Speed Error

Whatsminer M20S, M21S, M30S, M30S+, M30S++, M31S, M31S+, M32, M50, M50S, M50S+,...

Whatsminer Error 110 – Fanin Detect Speed Error

Whatsminer M20S, M21S, M30S, M30S+, M30S++, M31S, M31S+, M32, M50, M50S, M50S+,...

Whatsminer M30S – Share Rejection Spike

Whatsminer M30S, M30S+, M30S++ (M30V1/M30V2/M30V3 hardware revisions)

Whatsminer M30S – Internal PSU Board Failure

Whatsminer M30S, M30S+, M30S++

Whatsminer – MinerTool Connection Timeout

Whatsminer M20S, M21S, M30S, M30S+, M30S++, M31S, M50, M50S, M50S+, M50S++, M53,...

Whatsminer M30S – Environmental Sensor Error

Whatsminer M30S, M30S+, M30S++ (M30V1 / M30V2 / M30V3 hardware revisions; button-board...

Whatsminer M60S – Firmware Signature Verification Failed

Whatsminer M60S, M60S+, M60S++

Whatsminer – Cannot Access Web Interface After Reset

Whatsminer M20, M21, M30S, M30S+, M30S++, M31S, M50, M50S, M50S+, M50S++, M53,...

Whatsminer M50S – Overclocking Instability

Whatsminer M50S, M50S+, M50S++

Whatsminer M30S – Water Cooling Leak Detection

Whatsminer M30S++ Hydro, M33S++, M53, M53S, M56, M56S (hydro variants), and any...

Whatsminer – Factory Reset via Button

Whatsminer M20, M20S, M21S, M30S, M30S+, M30S++, M31S, M31S+, M50, M50S, M50S+,...

Whatsminer M60S – Chip Bin Mismatch

Whatsminer M60S, M60S+, M60S++

Whatsminer M50S – Power Limit Triggered

Whatsminer M50S, M50S+, M50S++

Whatsminer M30S – Hashrate Fluctuation

Whatsminer M30S, M30S+, M30S++ (M30V10 / M30V20 / M30V30 hardware revisions)

Whatsminer – MinerTool Diagnostic Codes

Whatsminer M20S, M21S, M30S, M30S+, M30S++, M31S, M31S+, M50, M50S, M50S+, M50S++,...

Whatsminer M60S – PSU Efficiency Drop

Whatsminer M60S, M60S+, M60S++

Whatsminer M50S – Hashboard Error via MinerTool

M50S (primary) · M50S+ · M50S++ · related procedures apply to M50,...

Whatsminer M30S – LED Slow Red Blink

M30S · M30S+ · M30S++ (same control-board LED schema, firmware-dependent on build...

Whatsminer M30S – LED Fast Red Blink

Whatsminer M30S · M30S+ · M30S++ (M30V1 / M30V2 / M30V3 hardware...

Whatsminer M50S – Grinding Fan Noise

Whatsminer M50S, M50S+, M50S++ (procedure overlaps with M30S, M53S, M56S, M60S —...

Whatsminer M30S – Rattling Noise

Whatsminer M30S, M30S+, M30S++

Whatsminer M60S – Control Board Boot Loop

Whatsminer M60S, M60S+, M60S++

Whatsminer – LED Status Code Reference

Whatsminer M20S, M21S, M30S, M30S+, M30S++, M31S, M31S+, M50, M50S, M50S+, M50S++,...

Whatsminer M50S – Control Board Not Responding

Whatsminer M50S, M50S+, M50S++

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Last reviewed June 29, 2026.