A4DA : High Current A Read all warnings and instructions prior to troubleshooting this product

To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.

  • Check wiring for touching wires.


  • Confirm resistance of heater.  Heater resistance should be 18-21 Ω for each heater element, 9-12 Ω combined for 10 kW systems, 6-8 Ω for 15 kW systems, and 4-6 Ω for 20 kW systems.  If out of tolerance, replace heater element.