Goodman
Outdoor fan
LockoutFailed outdoor fan
Fan not running in cool, or not restarting after defrost in heat. Ices the outdoor in heat; high-heads in cool.
Walk Outdoor fan in Diagnose
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First check
1 Is it actually in defrost?
On Goodman GSZC18 confirm the board thinks it is in defrost: OD fan off, RV shifted, indoor calling heat/aux. A failed OD fan in heat ices the coil and looks like a defrost board. Voltage at the fan motor / ECM plug when the board is commanding fan.
Expect: Defrost only with a cold outdoor coil, not on every call.
The rest of the walkthrough is Diagnose.
On the plates
- Voltage at the fan motor / ECM plug when the board is commanding fan.
- Capacitor only on PSC fans — many of these outdoors are ECM. Confirm the motor family.
- Blade ice, seized bearing, control output. A fan that dies mid-defrost leaves a block of ice and an LPS/HPS sandwich.
Plates that use Outdoor fan
Same number, other makers
Outdoor fan on Goodman is not the same code on these plates.