Frigidaire · Refrigerator error code
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Guide · RefrigeratorRule out demo mode, airflow, fans and defrost first, then use LG's forced-run diagnostic to see whether the compressor runs. If the compressor runs but doesn't cool, or won't start with a good board, it's a sealed-system failure: refer it to LG service or an EPA 608-certified technician and check the compressor warranty.
Guide · RefrigeratorWork from the outlet inward: supply, cord, door/display harness, then the boards. Many 'dead display' calls on French-door and side-by-side units are harness faults at the door hinge, not failed boards.
Guide · RefrigeratorThe defrost system (heater, defrost thermostat/thermal fuse or sensor, and the timer or control board) must melt the coil frost every few hours. If any of them fails, the coil turns into a block of ice and airflow stops. Test the heater and the limit with the coil still cold.
Frigidaire · Refrigerator
4
Air damper not detected
Frigidaire · Refrigerator
dF
Defrost circuit error
Frigidaire · Refrigerator
H1 / HI
High temperature alarm
Frigidaire · Refrigerator
OP
Temperature sensor open
Frigidaire · Refrigerator
Sb / 5b
Sabbath mode indicator
Frigidaire · Refrigerator
SH
Temperature sensor shorted