Arkansas HVACR NewsMagazine January 2024

HVACR NewsMagazine January 2024

Tech News

Problem #5: Spark Ignition Wire

Problem #6: Spider Webs or Insects Clogging the Orifices or Burners Another issue that tends to effect package units more than other types of systems are clogs in the orifices or burner due to insects or spider webs. One sign of clogging is that only some, but not ALL, of the burners light. This may lead to a system short cycling because the flame proving process cannot be complete.

The spark ignition wire runs from the control board to the spark igniter. Typically the wire will run through a hole in a piece of metal to get from the control board compartment to the combustion compartment. The wire is usually protected by either plastic or rubber guards to prevent it from rubbing against the metal frame. If the wire does rub against the metal frame and the insulation is removed, the metal wire may become exposed to the ground frame. Because of the high voltage used by the spark ignitor, the spark will jump from the exposed wire to the ground frame instead of traveling to the front of the burners where it is supposed to go. If this occurs, the wire needs to be replaced.