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.

• Weil-McLain Boiler Error Code E10 — Causes & Fix

  22 Apr, 2026

  Diagnose Weil-McLain Boiler Error Code E10 - Causes & Fix: likely causes to check, measurements to verify, and repair decisions before parts replacement.

• Weil-McLain Boiler Error Code E08 — Causes & Fix

  22 Apr, 2026

  Diagnose Weil-McLain Boiler Error Code E08 - Causes & Fix: likely causes to check, measurements to verify, and repair decisions before parts replacement.

• York Furnace Error Code E2 — Causes & Fix

  22 Apr, 2026

  Diagnose York Furnace Error Code E2 - Causes & Fix: likely causes to check, measurements to verify, and repair decisions before parts replacement.

• York Furnace Error Code E3 - Pressure Switch Fix

  22 Apr, 2026

  York furnace E3 means the pressure switch is stuck closed. Check switch continuity, tubing, condensate in the inducer, wiring shorts, and reset.