F01 error code troubleshooting

Washer had been sounding terrible during draining. And the quit running during random intervals during a cycle. Mostly right after the wash cycle. Cleaned filter, no success. Replaced the drain pump assuming it was the issue, had that problem before. Nope. Also changed the door lock switch thinking it was the safety mechanism preventing a spin cycle. Nope. Finally ran the diagnostic and figured out the F01 code. Checked my ccu for bulging capacitors or burnt out solder point. It looks good to me (though I'm not s professional). Any ideas before I go dropping money on a new ccu? I read somewhere I might have a timer issue?