Goodman 96% single stage ECM Furnace. Mutli-position and dedicated downflow models. 

Models this article applies to:

GM9S960403AN

GM9S960603BN

GM9S960803BN

GM9S960804CN

GM9S960805CN

GM9S961005CN

GM9S961205DN

GC9S960403BN

GC9S960603BNA

GC9S960804CN

GC9S961005CN

GC9S961205DN

Goodman 1 stage ecm furnaces will have board with a 3 digit display but this unit does not have the blue tooth capability. All setting to be done using the menus and push buttons to navigate.

When you see furnace running it will display something like "F04" Which simply  means fan running on speed tap 4. If there is a call for heat it will alternate between "GH1" and "F04", again these are status codes.

Errors will Have "EE" or "E" in the display. For example "EE2" or "EEJ".

Heating Mode Speed Selection: The manual states you need to get to the "gA1" option in the menu to change the speeds. This is actually incorrect and you will be looking for the "gAF" menu option.

The code "IDL" or if you are reading board upside down,"7P1" is strictly saying that the furnace is idle with no call. This is not a fault code.

GOODMAN GM9S96 SINGLE STAGE INCOMING AND MANIFOLD PRESSURES:

Incoming Natural Gas: Minimum of 4.5" w.c. and  Maximum 10" w.c.
Incoming Propane or LP Gas: Minimum 11.0" w.c. and Maximum 13.0" w.c.

Manifold Natural Gas Pressure: 3.5" w.c.
Manifold Propane or Lp Gas Pressure: 10.0" w.c

Speed Tap Correction For Service Manual:

See below for more information: