Melissa Vascio wrote in message ...
My Symmons Temptrol (Model B) temperature balanced shower valve is only
putting out cold water. Symmons lists this common problem on their
website, http://www.symmons.com/service/product_info.cfm#Q6
and first fix is to remove the handle and tap the spindle a few times
with a rubber hammer. That didn't work.

Next, the solution is to remove the spindle assembly.
http://www.symmons.com/ins/temptrol_ins.pdf#page=5 (pdf file)

Here's where I'm having trouble. I can't remove the cap (part T12-A).
I've taken a wrench to it and it won't budge despite a lot of torque.
I'm afraid to apply any more force on the wrench because the valve is
supported by the plumbing inside the wall.

Has anyone had this problem or know what to do? Perhaps heating it a
little with a torch would expand the cap enough to unscrew. Thanks!

I had a stuck T-12A cap and was able to get it off with WD-40 and an
upgrade to a real 14" pipe wrench. My puny monkey wrench was not the
right tool for the job. I sprayed the WD40 completely around the cap
seam and let it sit for 30 minutes. Save the torch as a last resort -
lots of meltables inside the temptrol.

fwiw...Chris