We recently installed a Moen single handle faucet in a refinished shower after having a plumber replumb the front of our house. Handle appears to be properly installed. Now there is no hot water or even water flow at all when we turn the handle to hot. The cold water in the shower flows just fine. There's a sink in the bathroom as well which has hot water. What is most likely the cause when there is no flow of water at all when a single handle faucet is turned all the way to hot? Hope this makes sense.

If the handle spins, but the cartridge remains stationary, then the stop inside the handle is broken and the handle must be replaced. To test, remove handle and see if you can turn the stem with a pliers. If you can turn the water on, then I'm right. Replace the handle. If not, then you have me stumped.

My first suggestion is to have the installation plumber return to adjust the faucet to function properly

There are several products that can be used to loosen the corrosion holding the handle in place. The Works is one product along with CLR. The easiest fix is to wrap a washcloth soaked in distilled white vinegar around the handle. Let it soak for 20 minutes at a time. It could take a half dozen times or more, but eventually it will work. Rinse the faucet after each application to remove the acid. You may also need to use this process to remove the Moen faucet cartridge.

You need a faucet handle puller, you can get these at most home center and hardware/plumbing stores.
Once you get the handle and cover off you might just find that the control was never fully mounted.

You can try to rotate the first plastic ring to the left of center a few teeth, this will let the handle advance alittle more to the hot side.

the cartridge if defective,replace it and your leak will stop.

Hired a plumber

You must of turned off your water to the house or maybe it was turn off in the street recently because it sounds as if you have debris in you strainer remove the head and rise of removing any dirt rise out both front and back of shower head while head is off run shower to make sure you are getting full pressure out of the pipe that the head is connected to

The plumber soldered in the faucet without removing the cartridge, the o-rings are melted. Have the builder replace the o-rings.

Hi rbyerly,

I'm Harvey the Master Plumber.

Your problem is:
remodeled bathroom,installed new moen valve and hardware. Now water is coming from both the shower head and the faucet when the diverter is in the down postion. Question; Is this a single handle or three handle diverter? Assuming it's a three handle, it should just be a mater of adjusting the center handle. If single, the diverter is in the spout not the valve. I don't know how to direct you further without specifics. Feel free contact me again!
Please give me a rating here at fixya.com before you sign off
Thank you,
Harvey your Master Plumber