FieldBench
Goodman codes

Goodman

TWIN

Lockout

Twin error

Twinning miswire or twin terminal active on a standalone unit. Door card lists TWIN on 0140F20001-B.

Walk TWIN in Diagnose

Sign in for the next measurement

First check

1 Is this cabinet actually twinned?

On a standalone Goodman GR9S80, nothing belongs on the TWIN terminal. A leftover jumper throws this. If not twinned, nothing should be on the TWIN terminal.

Expect: TWIN empty on a single cabinet.

The rest of the walkthrough is Diagnose.

On the plates

  • If not twinned, nothing should be on the TWIN terminal.
  • Twinned pair must be same family / same IFC revision.

Plates that use TWIN

Same number, other makers

TWIN on Goodman is not the same code on these plates.