HVAC, Appliance, CNC, and VFD Error Code Repair Guides

Browse repair guides for HVAC, appliances, refrigeration, CNC alarms, VFD faults, generators, boilers, water heaters, and commercial equipment.

• Haas Alarm 116 — Causes & Fix

  22 Apr, 2026

  Troubleshoot Haas Alarm 116 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech.

• Haas Alarm 117 — Causes & Fix

  22 Apr, 2026

  Troubleshoot Haas Alarm 117 on CNC equipment with checks for servo load, spindle drives, parameters, wiring, and when to call a controls tech.

• Heatcraft Refrigeration Alarm 3 — High Discharge Temperature

  22 Apr, 2026

  Heatcraft Refrigeration Alarm 3 - High Discharge Temperature: likely causes, checks, and repair decisions before replacing parts.

• Hill Phoenix Display Case E1 Error Code — Sensor Fault Fix

  22 Apr, 2026

  Hill Phoenix Display Case E1 Error Code - Sensor Fault Fix: likely causes, checks, and repair decisions before replacing parts.