Bosch PRO Bohrhammer GBH 2-21 — Error codes & fixes
Troubleshooting guide for the Bosch PRO Bohrhammer GBH 2-21. Diagnose an error code and find the fix.
LED light not working
led-not-workingThe tool's LED work light does not turn on, often due to a wiring issue or a faulty LED.
Source: Bosch support — power tool troubleshooting
Confidence: 75%
Verified Aug 9, 2026
Trigger not working
trigger-not-workingThe power tool trigger does not respond, often due to a switch fault or debris.
Source: Bosch support — power tool troubleshooting
Confidence: 80%
Verified Aug 9, 2026
No suction (vacuum tool)
no-suctionThe vacuum tool has no suction, often due to a clogged filter or a full dust bag.
Source: Bosch support — power tool troubleshooting
Confidence: 80%
Verified Aug 9, 2026
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