i have a similar problem. had a power outage and when the power was restored the doorbell would continuously ring, escalating in volume. i just unplugged it! any suggestions?
If you push the buttons (try both front and back doors) does the doorbell reset itself and then work normally.
A doorbell power failure indicator that causes it to ring continuously is not a good idea because no one might be home and the sound would give away the fact the house is unoccupied.
The average homeowner who lost his house in the Oklahoma tornadoes should move for good and not rebuild. Too much complexity watchdogging the contractor. Too much a chance to be defrauded.