Here is the manual for the R32 Goodman modulating furnace.

NOTE: Supply air and Return air sensors (0130F00933 and 0130F00934) are OPTIONAL accessories, and are not required for the system to work properly. The control board is equipped with an "on-board" sensor, which is used for control algorithms. If a return air sensor is added, the control board will average the 2 sensors and use that value for control algorithms. 

Applicable Models:

• Base Model: GRVM970603BN

  • Revision: GRVM970603BNAA

• Base Model: GRVM970803BN

  • Revision: GRVM970803BNAA

• Base Model: GRVM970804CN

  • Revision: GRVM970804CNAA

• Base Model: GRVM971005CN

  • Revision: GRVM971005CNAA

• Base Model: GRVM971205DN

  • Revision: GRVM971205DNAA

• Base Model: GDVM970603BN

  • Revision: GDVM970603BNAA

• Base Model: GDVM970803BN

  • Revision: GDVM970803BNAA

• Base Model: GDVM970804CN

  • Revision: GDVM970804CNAA

• Base Model: GDVM971005CN

  • Revision: GDVM971005CNAA

If you are using a non-A2L refrigerant with this furnace, be sure to see our video here below to turn it off.