Ray, I'm just a diy sort -- was just searching for a picture.
I have a similar prob but mine is HOT alla time! We've not used the shower for 3 - 4 years (have a couple others of course !
:-) I have in hand an American Std. part # 66269-0070A. I got it a while back but ASSUME it'll fix the prob. Years ago it acted up and I took it all apart (BUT had to have the whole house water off for 3 - 4 hrs) and soaked it in vinegar to free it up. This time it gets replaced! -- just 4 Phillips head screws. (I took notes the first time) JL
luuie
December 2007