In one of the two bathrooms - that we rarely used - I recently found that shower has now only hot water running. The valve is Moen brand with a single knob. On turning this, I get no cold water, but just hot water. I removed the knob, and decided to maybe replace the cartidge, but could not make any headway, after removing the acrylic knob. First, do I need to remove the cartridge?If yes, how? Is it possible to remove it without removing the back-plate glued to the Tile walls? Will appreciate detailed instructions to remove or fix the valve?thanks
It probably has to do with the water pressure coming through the pipes is just causing the pipes to move. If you don't want to take your shower out, find out if you can get to the pipes from the other side of the wall, like from the bedroom or hallway. You may be able to use a metal detector and find the path of the pipes and make a couple of small holes to stabilize the pipes
Moen, as well as many other brands have a feature that is cald a pressure balancer, or scald guard. Long story short, its so you don't burn yourself or freeze when some one flushes a toilet or the washing machine kicks in. You need to change it. Take off the handle, this may require and allen wrench to go in the bottom part of the handle, and then remove the front cover plate. Then take off the screw in the center of the valve. Remove the tube on the valve.( This should be a tube with a square notch at the top)Then remove the clip holding the cartridge. It has enough sticking out the top for you to grab it and pull it up. (Make sure your water is off) Then pull the cartridge out. Got a good grip and PULL. It doesn't always come out easy. Then replace it with a new one, and put it back together. Tada!!! Now Moen offers a lifetime warranty of parts, so it shouldn't cost you more then elbow grease. Find a local plumbing supply warehouse and they will give you a new cartridge for free, although they may require you to bring the old one first. Home depot or Lowes will not they will charge you 35-45 bucks. Hope this helps. Good Luck!!!!!
the valve should have a c shaped clip holding it in. do that with the water shut off. if you have cold water to the tub spout, maybe the valve body is clogged with sediment, or a CW valve has collapsed.you have to remove the back plate to access the valve body.
