Rachel said in the quote below:
The fact that Ellen White had a faulty understanding of the Trinity demonstrated the truth of her statements to the effect that the Bible was the standard and Ellen White's writings were to be judged by the Bible. We today, as in the time of Ellen White are to go to the Bible to see what the Bible teaches as a standard of our doctrinal beliefs. This does not mean that we are to exclude what EGW said from our consideration of doctrinal understandings any more than we should exclude what I may say in a sermon on Saturday morning. Hopefully, both what I may say in that sermon as well as what EGW may have written will have some value in our consideration of a doctrinal position. However, regardless of that, both EGW and my Saturday sermon are to be subjected to the authority of the Bible and if the Bible disagrees with what either of us has said, we are wrong and the Bible is correct..