Haas Error Code Reference — All 12 Codes
Complete Haas error code cheat sheet. All 12 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your Haas drive, CNC, servo, or controls hardware posts an alarm during production. Start with the exact code, then open the fix guide for overloads, encoder faults, communication alarms, power quality issues, and drive or board failures.
Tip: search the exact brand, model, and alarm together, for example "Haas F0001" or "Haas overcurrent fault".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| Haas Alarm 102 | Servo Drive Fault Fix | — | Fix → |
| Haas Alarm 104 Feed Hold | Causes & Fix | — | Fix → |
| Haas Alarm 111 | Drive Fault | — | Fix → |
| Haas Alarm 117 | Causes & Fix | — | Fix → |
| Haas Alarm 120-129 | Automatic Tool Changer (ATC) Fault Fix Guide | — | Fix → |
| Haas Alarm 219 | X-Axis Servo Error Fix | — | Fix → |
| Haas CNC Alarm 101 | Emergency Stop Active Fix | — | Fix → |
| Haas CNC Alarm Codes | Complete Guide (100-Series and Up) | — | Fix → |
| Haas Next Generation Control Alarm Codes Guide | Haas Next Generation Control (NGC) alarm codes: what each means and how to fix it. | — | Fix → |
| Haas SL-20 Lathe Common Alarms | What They Mean and How to Fix Them | — | Fix → |
| Haas VF-2 Common Alarms Guide | What They Mean and How to Fix Them | — | Fix → |
| Haas VF-4 Common Alarms Guide | What They Mean and How to Fix Them | — | Fix → |