Here's one for you. Turn on the shower, plenty of hot water. Turn to the right, water shuts off. Wait a day, all better. This has happened twice this year. Do these cartridges go bad slowly?

Cartridges can go bad and parts can come loose, so it may be time to replace yet another cartridge. The good news is that if you call Moen at 1800BUYMOEN they will usually send you out a replacement for free (including shipping)!!

Good luck!

Mark