FieldBench
Goodman codes

Goodman

7 / 8 flash

Protect

Flame / igniter

Rod or HSI.

Walk 7 / 8 flash in Diagnose

3 plates — walk the one on the cabinet

First check

1 Ohms at the igniter, then at the IFC

On Goodman GMS80 measure cold ohms at the igniter plug, then at the IFC connector. An open at the plug is the element or local harness. Open only at the IFC is the harness rub-through on the collector. µA, nitride or Norton per this cabinet, gas.

Expect: Nitride cold ohms per THIS door sticker — do not use an 80% Norton chart.

The rest of the walkthrough is Diagnose.

On the plates

  • µA, nitride ohms, 120 VAC during trial.
  • µA, nitride or Norton per this cabinet, gas.

Plates that use 7 / 8 flash