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.

• York Rooftop Unit Error Codes - Predator and ZF RTU

  Updated: 17 Sep, 2026

  York RTU error-code guide for Predator, Affinity, and ZF rooftop units, including pressure lockouts, ignition faults, flame-sense errors, sensors, and blower faults.

• Hurco CNC Fault Codes - WinMax Servo, Spindle, ATC Alarms

  Updated: 17 Sep, 2026

  Hurco CNC fault codes for WinMax VM, VMX, TM, and TMX machines: servo parameter, spindle drive, ATC door, encoder, coolant, and E-stop alarms.

• Generator Fault Codes - Generac, Kohler, Cummins Onan, Honda, and Portable Units

  17 Sep, 2026

  Generator fault-code hub for standby, RV, and portable units: overcrank, low oil, overspeed, AVR voltage faults, battery, and transfer issues.

• Speed Queen Washer EL Error Code: Display Check and Fix Path

  17 Sep, 2026

  Speed Queen washer EL error code help: verify the exact display, compare dL, LF, OV, and DC faults, then check lock, fill, and drain parts.