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.

• Allen-Bradley MicroLogix 1400 Common Fault Codes

  22 Apr, 2026

  Allen-Bradley MicroLogix 1400 guide for major and minor faults, RSLogix 500 fault queues, LED indicators, LCD messages, and battery issues.

• American Water Heater Error Codes - Pilot, Gas Valve, and Element Faults

  22 Apr, 2026

  American Water Heater codes identify pilot, gas valve, thermocouple, element, thermostat, pressure switch, and power-vent faults.

• A.O. Smith Water Heater E1 Error Code - Sensor Fault Guide

  22 Apr, 2026

  A.O. Smith E1 water-heater guide for temperature sensor faults, Voltex and ProLine models, thermistor testing, wiring, and sensor replacement.

• Bradford White Error Code 7 - Pilot Out

  22 Apr, 2026

  Bradford White code 7 points to pilot or flame-sense trouble. Check the pilot flame, sensor rod, gas valve, grounding, and vent draft.