Refrigerant fault: gas furnace codes by brand

Refrigerant charge, leak detection or circuit temperature is out of range.

Brand	Code	Meaning	What you can do
Carrier	10.2	Refrigerant leak detected, dissipation active	Call a pro
Goodman	EA0	R-32 refrigerant leak detected	Safe checks first, then a pro
Goodman	EA1	R-32 refrigerant sensor fault	Safe checks first, then a pro
Goodman	EA2	A2L relay fault on the control board	Safe checks first, then a pro
Goodman	EAF	Lost communication with the R-32 refrigerant sensor	Safe checks first, then a pro
Goodman	EAL	R-32 refrigerant leak detected	Safe checks first, then a pro
Goodman	EAr	A2L relay fault on the control board	Safe checks first, then a pro
Goodman	EAS	R-32 refrigerant sensor fault	Safe checks first, then a pro