If your Carrier, Bryant, or Payne gas furnace is failing to light -- or cycling without ignition -- a worn or cracked pilot burner spark electrode is one of the first components to check. This direct-replacement electrode matches the OEM Carrier part number LH680512 and is also cross-referenced as NBK Parts 20231-1. It restores reliable spark ignition to the pilot burner assembly with no modifications required on compatible models.
The spark electrode is the component that generates the high-voltage arc to ignite the pilot flame in a standing-pilot gas furnace. Over time, the ceramic insulator can crack, the electrode tip can erode or carbon-foul, and the bracket can corrode -- all of which cause weak or absent spark. Replacing the electrode is a straightforward repair that can restore full furnace operation without replacing the entire pilot assembly.
This replacement is manufactured to match the geometry of the original LH680512: the same 1/2 in. igniter length, matching bracket footprint, and the same high-voltage lead connection style used across the compatible Carrier furnace families listed below.
Replaces Carrier LH680512 and cross-references to NBK 20231-1. No adapter or modification needed on compatible models.
1/2 in. igniter tip length and 3/4 in. x 1/2 in. mounting bracket keep spark gap and positioning consistent with the original assembly.
Compatible across multiple furnace model families from all three brands that share the LH680512 pilot burner specification.
At 0.2 lbs., this small but critical component is simple to install -- typically requiring only a screwdriver and a spark lead reconnection.
In a standing-pilot furnace, the spark electrode sits adjacent to the pilot burner orifice. When the furnace calls for heat, the ignition control board sends high voltage to the electrode, generating a rapid arc that ignites the gas at the pilot tip. Once the pilot flame is established, a thermocouple or thermopile senses the flame and allows the main gas valve to open.
A damaged electrode -- cracked ceramic, eroded tip, or poor ground path through the bracket -- prevents this arc from forming reliably. The result is a furnace that clicks but does not light, or one that lights inconsistently and then locks out.
This electrode is confirmed compatible with the following Carrier furnace model numbers. Verify your model number on the furnace data plate (typically located inside the blower compartment door) before ordering.
Also fits select Bryant and Payne furnace models that share the LH680512 pilot assembly specification. Cross-reference your existing electrode part number to confirm fit.