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.

• Samsung Washer nF Error Code — No Fill Fix

  6 Jun, 2026

  Samsung washer nF error means water isn't entering the machine in time. Check water supply valves, inlet screens, and pressure before anything else.

• Whirlpool Dryer F01 Error Code — Control Board Fix

  6 Jun, 2026

  Whirlpool dryer F01 means the main control board has failed. Verify the outlet is providing 240V before ordering a board — it's an easy check.

• Whirlpool Dryer F70 Error Code — Communication Fix

  6 Jun, 2026

  Whirlpool dryer F70 means the control boards have lost communication. Check the ribbon cable connection before replacing either board.

• Whirlpool Washer F20 Error Code — No Water Fix

  6 Jun, 2026

  Whirlpool washer F20 means no water was detected during fill. Check the supply valves and inlet screens before assuming the washer is broken.