[BIPD818]

Greetings,
Our GE Monogram ZBD5900 has begun failing to drain and defauting to an error mode. Sometimes pulling the circuit breaker and pushing various control buttons gets the washer to drain and complete the cycle. The error indication is a blinking "rinse and hold" LED. Usually if I bail all the water out of the washer and then cut the power, the washer will then cycle properly for one cycle. What controls the drain cycle? Just the drain pump? Or does the sump float switch affect the drain cycle? I've removed the control board and the components, traces, and connectors all look fine. Any suggestions would be greatly appreciated. Thanks.