Error Code COMP-MOTOR-LOCKED
Compressor is mechanically stuck or running too slowly
Moderate
Address soon - your appliance may not work properly
Also displayed as: F and R blink in sequence — Motor Locked/Over RPM pattern
What This Means
Compressor mechanically seized or locked rotor; Refrigerant system restriction (blocked capillary tube, restricted dryer); Compressor started before pressure equalization (less than 7-minute delay); Sudden input voltage spike or sag; Compressor wiring issue
What actually causes this:
The compressor cannot turn — it is either seized, the refrigerant system is blocked, or it was started too soon after shutting off.
First Thing to Check
If the unit was recently moved or power just came back on, wait 10 full minutes before expecting the compressor to start.
Parts Involved
How to Fix
- 1
Wait 10 minutes for pressure equalization before retesting
- 2
Confirm input voltage is stable (110–127V or 220–240V AC as applicable)
- 3
Verify compressor wire connections at CN04 are secure
- 4
Check refrigerant cycle — excessive suction pressure may indicate restriction
- 5
If compressor is mechanically locked, replace compressor assembly
Other Error Codes for RF28T5A01S9
Refrigerator compartment temperature sensor is disconnected or dead
Internal humidity sensor has failed or is disconnected
Defrost sensor on freezer evaporator is failed or disconnected
Freezer fan motor is not running or not sending feedback
Supply voltage to compressor is too high
Freezer temperature sensor is failing or disconnected
Ice maker temperature sensor in freezer is failed or unplugged
External room temperature sensor is failed or disconnected