No Hot water from shower - Single handle knob
Hello,
In our secondary bathroom, our shower/tub has a single handle knob and when turned to HOT no hot water comes out at all and it just shuts off the water (it drips just a little bit when on full HOT, and that water is also NOT HOT). It is a condo unit and it used to work just fine and this particular shower has seen very little and infrequent use. All other faucets work perfectly fine in the condo.
http://img26.imageshack.us/img26/8528/p1010841u.th.jpg
http://img146.imageshack.us/img146/5924/p1010842.th.jpg
What do you think the problem is and how can I fix it myself? Thank you for any and all help!
-Mike