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.

• Lennox Error Code 327 — Causes & Fix

  22 Apr, 2026

  Troubleshoot Lennox error code 327 on HVAC equipment with checks for power, airflow, sensors, ignition, safety circuits, and parts to price before service.

• Lennox Error Code 414 Rollout - Rollout Switch Fault

  22 Apr, 2026

  Diagnose Lennox 414 rollout faults: rollout switch continuity, flue restrictions, inducer draft, gas pressure, and reset decisions.

• LG Mini Split CH02 Error Code — Causes & Fix

  22 Apr, 2026

  Troubleshoot LG mini split CH02 on HVAC equipment with checks for coil sensors, wiring, control boards, and parts to price before service.

• Manitowoc Ice Machine Error Code 3 — Causes & Fix

  22 Apr, 2026

  Manitowoc error code 3 guide for long freeze cycles, dirty condensers, fan problems, water temperature, refrigerant issues, and resets.