What does it mean if 'OP' or 'SH' is flashing on the display?
If 'OP' or 'SH' is flashing, it may indicate that the control system has detected a performance problem. You should call your service representative, who can interpret the flashing message. (Page 14)
From the official Whirlpool WRF736SDAM Refrigerator manual, page 14
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