On Oct 12, 10:01*pm, "SteveB" wrote:
I was taking a shower, when the water started a chattering noise, and the
spray was a pulsed spray. *This came on when the Moen twist dial was in the
same position for about two minutes. *I changed the dial, then returned it
to the original temperature position, and it did it again. *A little
adjustment of the dial makes it go away, but it returns. *What's this?

Steve

Is it an anti-scald valve? Sounds like the mechanism that controls the
balance might be hanging up.

I'm not sure if a rebuild kit contains those parts.

Give Moena call and see.