Shower valve leaking & too much hot water

[JJH3rd]

I've got almost no cold water in the shower of our 05 Dolphin 5342. The only hint that some cold water is in the mix is that the water can get hotter as I rotate the valve to its hottest setting.

I thought that I have a valve problem so I removed the core of the valve and examined it and it looked OK, however after I put it all back together now the shower leaks a little water all of the time.

It looks like I'll be disassembling the mixing valve and trying to figure out why "off" isn't really shutting off all water flow.

Any ideas, suggestions and hints or outright instructions would be most welcome


I still haven't figured out why there was too much hot water (or not enough cold water)

[speed racer]

On mine(05 dolphin 5355 The mixing valve comes as an assy. and you can't buy parts for it. I replaced mine 2yrs ago at the cost of 35$ and it is starting to leak again. I beleive that setting around with no water in it dries out the seal ad causes it to leak past the valve and the hot watter side could be leaking into the cold side. Take the old one with you to the hardware store because the will want to know what brand and model it is and I don't know. Clean the inside of thr housing before you install the new one.

[targaboat]

There are check valves that are there for the winterization process which can get stuck from the calcium in the water. They are in the inlet and/or outlets to the back of the hot water tank. The only fix is to remove them for cleaning or replacement.

[JJH3rd]

I figured out the drip problem.

There is a limiter, a circular piece of nylon(?) that prevents the amount of travel the through which the valve can turn. On the limiter is imprinted with text about limiting the amount of hot water.

When I put the limiter back in place the first time, it was oriented turned too far counter-clock-wise. This meant the valve couldn't turn clock-wise far enough to fully shut off the water.

This was an easy fix so my next task is to search for problems in the water supply (cold & hot) which was the original problem: too much hot water and no detectable cold water.

Here are images of the valve and limiter,

Thanks folks for all of the help.

JJ