FieldBench
Goodman codes

Goodman

FE3 / LE4 / SE5 / rE6

Hazard

A2L mitigation

Leak / comm / relay alarm from the A2L board when paired with R-32 or R-454B outdoor.

Walk FE3 / LE4 / SE5 / rE6 in Diagnose

3 plates — walk the one on the cabinet

First check

1 Confirm this pair is actually A2L

On Goodman GR9S80 FE3 / LE4 / SE5 / rE6-class codes are only valid when this furnace is tied to an R-32 or R-454B outdoor. On R-410A this is a miswired mitigation harness — not a leaking indoor coil.

Expect: Outdoor refrigerant from the outdoor nameplate, not from memory.

If fail: Remove / correct the mitigation harness. Do not condemn the IFC.

The rest of the walkthrough is Diagnose.

On the plates

  • Only valid on A2L pairs. On 410A, this is a miswired mitigation harness.
  • Leak sensor location, ventilation blower, and OEM mitigation sequence before you condemn the IFC.
  • This is Category I metal vent. There is no 96% collector or PVC trap to prime.
  • Cap, liner, common-vent tables, inducer wheel, hose on the inducer housing.
  • Only valid on A2L pairs. On 410A this is a miswired mitigation harness.

Plates that use FE3 / LE4 / SE5 / rE6

Same number, other makers

FE3 / LE4 / SE5 / rE6 on Goodman is not the same code on these plates.