Goodman furnace code Id L: Normal Standby
Info — not a fault
What does IdL mean on a Goodman furnace? IdL is the normal idle display on supported Goodman furnaces. The control is powered, waiting for a thermostat call, and ready to receive thermostat inputs. It is not a fault code.
Questions about this code
What does IdL mean on a Goodman furnace?
IdL is the normal idle display on supported Goodman furnaces. The control is powered, waiting for a thermostat call, and ready to receive thermostat inputs. It is not a fault code.
Does Goodman furnace code Id L mean I need a repair?
It isn't a fault. If the house isn't warming, check that the thermostat is set to heat and above room temperature, and call a technician if that doesn't help.
How much does it cost to fix Goodman furnace code Id L?
IdL by itself doesn't need a repair, so there's no cost tied to it. Any service cost would depend on a separate problem a technician identifies.
Applies to
GMVC96 · GCVC96
Different Goodman generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Verified against Goodman AMVC96/GMVC96 Service Manual (RS6612014), p.44 — “The control board will display "Id L" while in idle (stand-by) mode waiting for a call from the thermostat.”
Last verified 2026-09-16 · page updated 2026-10-03 · how we verify
Other Goodman furnace codes
These links include other Goodman model families. Code meanings can change by model and control board, so confirm your model and service manual before using a definition.