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.

• Bohn Refrigeration Error Codes - Temperature, Defrost, Sensor, and Fan Alarms

  Updated: 26 Sep, 2026

  Bohn unit-cooler alarms cover high box temperature, discharge temperature, suction pressure, defrost termination, fan motors, and sensors.

• Bradford White Infiniti K Tankless Water Heater Error Codes

  Updated: 26 Sep, 2026

  Bradford White Infiniti K tankless codes flag ignition, flame loss, combustion, condensate, scale, thermal fuse, and sensor faults.

• Daikin J3 Discharge Pipe Sensor Fault

  Updated: 26 Sep, 2026

  Daikin J3 guide for discharge-pipe sensor faults, abnormal compressor temperature, thermistor testing, coil airflow, charge issues, and technician checks.

• Eccotemp i12 Tankless Error Codes

  Updated: 26 Sep, 2026

  Eccotemp i12 indoor tankless guide for E1-E9 faults, including ignition failure, flame loss, temperature sensors, water flow, and fan issues.