FieldBench
Goodman codes

Goodman

idle / Ht / CF

Status

Status, not a fault

Normal run states. idle = standby. Ht = heat running (capacity is a percent, not Ht1/Ht2 stages). CF = continuous fan.

Walk idle / Ht / CF in Diagnose

Sign in for the next measurement

First check

1 Confirm this is not a fault

On the Goodman GRVM97 this readout (idle / Ht / CF) is run status, not a lockout. Write what the display actually shows and whether W/Y/G is present at the IFC.

Expect: Idle / Ht / CF / stage+CFM words change when you apply and remove the call.

If fail: If the word never changes on a real call, the call is not reaching this IFC.

If pass: The board is alive. Diagnose the comfort complaint, not this code.

The rest of the walkthrough is Diagnose.

On the plates

  • Do not replace the board because it says Ht or CF.
  • Ht that never climbs off a low rate is a prove / valve / menu problem, not a ‘stuck Ht1’ two-stage code.

Plates that use idle / Ht / CF

Same number, other makers

idle / Ht / CF on Goodman is not the same code on these plates.