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.

• Bosch Washer F21 Error Code — Heating Timeout Fix

  14 Jun, 2026

  Bosch washer F21 points to a motor or drive fault. Check drum binding, brushes on older models, motor wiring, tach signal, and control board.

• Bosch Washer E18 Error Code — Heating System Fault Fix

  14 Jun, 2026

  Bosch washer E18 usually means drain trouble. Check the pump filter, drain hose, impeller, standpipe height, and pump wiring.

• Bradford White Error Code 2 Sensor Fault

  14 Jun, 2026

  Bradford White code 2 guide for water-heater temperature sensor faults, thermistor wiring, control readings, resets, and replacement checks.

• Bradford White Error Code 5 Flame Sense

  14 Jun, 2026

  Bradford White code 5 guide for flame-sense faults, dirty rods, burner ground, gas controls, wiring, and ignition-safety checks.