The Bible says, in Deuteronomy 18:20-22, that anyone claiming to speak on behalf of God that does so and it doesn’t come to pass, they are not to be listened to or feared.
Some of her key failed prophecies include:
• The End of the World (1843, 44, 45, 49 and 51)
• The Return of Christ (multiple times)
• The 1843 Miller Chart (which changed 3 times)
Because of this, Ellen White violated the Third Commandment repeatedly (Exodus 20:7) which is bearing the name of God falsely, and—in God’s economy—she would have been stoned to death.
The Adventist Church’s typical defense to this is to say the prophecies that failed were all conditional and the conditions were never met, thus they weren’t failed prophecies. Those mentioned above do not fit this bill which is why we have chosen those out of many.
They are also sometimes quick to assert that “Ellen White never claimed to be a prophet” and that was only something others called her. If this is the case, they are then admitting to not being the Remnant Church because they claim her prophetic gifting is “the identifying mark of the Remnant Church.” Furthermore, Mrs. White never adopted the title of a prophet for herself because she said “her work includes much more than this name signifies.”, not because she didn’t actually claim to be speaking on behalf of God.