Plumbers: Symmons Temptrol Sticking

[kenny]

John
It is a fairly common problem. The fix is to replace the stem
another fix is to remove the stem blast w/wd 40 or boil it in vinagar
then shake it back and forth till you hear the balance valve move.
Either way shut off water supply,turn handle to the middle ,remove handle,loosen and remove nut and pull out stem
hope this helps

[kenny]

Just thinking if it's the diverter remove control handle,remove face plate,remove large hex nut,screw lag bolt into plastic cartridge,pull straight out and replace the divertor