How to get WiX major upgrade working?

Question

I am struggling to enable the major upgrade functionality in WiX.

I want every new version of the installer to be a major upgrade (full uninstall, then new install)

Answer 1

I know this post is old and answered, but, in case anyone runs across this, I had issues with my upgrade installer. The upgrade sections were all fine. The installer would run, but, the previous version was never removed, therefore, the new version was not installed. The issue was this

The Level="0" above, should have been Level="1" as it is below:

Scott