How to Replace the Igniter in a Diamond 80 P2MP


Modern gas furnaces like the Diamond 80 P2MP have automatic igniters that fire up the furnace. This is safer than lighting the furnace by hand. With age and use, you may need to replace the Diamond 80 P2MP igniter. Igniter failure can lead to the furnace being automatically shut off and the gas supply cut. You can get a replacement igniter from a number of electronic supply stores or order one on the Internet.

Things You'll Need

  • Replacement igniter
  • Nut driver
  • Turn off the power to the furnace. The power switch for the furnace, which is red and looks like a light switch, is on the wall near the furnace.

  • Hold onto the handle of the burner access door and lift it up and out to remove it.

  • Locate the igniter, which is between the flame sensor and the burner assembly.

  • Press on the locking tabs with your thumb and forefinger to remove the wiring harness from the igniter. Lift the wire harness free of the igniter.

  • Remove the two hex screws with the nut driver. Pull the igniter out of the furnace, noting its orientation.

  • Insert the new igniter. Take care not to touch the igniter tip, as it is made of porcelain and the oils from your fingers will shorten its lifespan.

  • Replace the hex screws and reattach the wire harness. Replace the door and turn the power back on.

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