If you do this, your account is put on nonactive (you can no longer log in ) and you wil get a e-mail with a link to activate your account again.
PAY ATTENTION TO :
As soon as you have done this, you can modify your password in this mail.
If you don't want to modify it, then press on the 2nd link, and then your old password will become active.
Only after you click on activate in this e-mailadres, your acount becomes active, with the new password.