Hello all. I thought I posted this question earlier today, but I can't find it anywhere. (sorry if it's a repost)

My shower has been leaking for a while, and the water temperature has been slowly changing. I went to the hardware store where they told me I most likely had to change the Symmons spindle. I found out that the piston in the spindle was stuck. I followed all the directions to change the spindle and it worked like a charm... for two days. On the third day I took a shower and as I turned the handle I felt some unusual friction and wasn't able to turn off the water.
I took everything apart again, and put everything together like I had done the first time, to no avail. Did I break anything? Do I need to replace the cap assembly too?
Thank you in advance for your help.