No Hot Water in Shower - Moen Single Handle Faucet

doug238 · Nov 28, 2007, 04:57 PM

Yes, it is.

rniyogi · Dec 27, 2008, 07:57 AM

I have the exact problem that is described in this thread. I have had 2 plumbers come and look at it and all they did is just change the cartridge, but that did not seem to help at all, rather worsened the issue. I am really getting frustrated at the moment as I am tired of taking luke warm showers.

The garden tub right next to the shower gets good hot water. From the instruction sheet from Moen (steps 3a-3c) explain about temperature settings. This is a 1222 cartridge for single handle faucet. Please help me if there is anything I can do to fix this I.e get more hot water in the shower?

Thanks in advance!

Raghu

doug238 · Dec 27, 2008, 10:01 PM

Replace the cartridge if it is leaking.
There are 2 types of moen single handle faucets. The chateau which has been around a long time, and the positemp. The chateau turns on by pulling the handle straight out then turn right to cold or left to hot. The positemp simply turns from right to left to turn on and to get warmer. It has a cog type gear that is under the handle which limits the amount the handle will turn to have a code required scald gaurd. For best results, adjust hot to a point that is very uncomfortable but you can keep your hand under it.

rniyogi · Dec 29, 2008, 06:28 AM

Thank you Doug! I do have posi temp. But, my question is how to adjust the cartridge to get more hot water. Please pardon my ignorance. I am not that familiar with plumbing, but trying to do stuff on my own as the last 2 plumber visists have been expensive and not getting any results. So, I would like to try this on my own. I would appreciate if you can send me step by step directions to do so.

doug238 · Dec 30, 2008, 05:01 AM

Take the handle off. There is a 2 piece white cog [gear assembly]. The outer piece is how to adjust the hot limit. The inner piece can only go in one way. Adjust the outer piece counter clockwise to get the handle to allow more roaming to the hot side.
the positemp simply turns from right to left to turn on and to get warmer. It has a cog type gear that is under the handle which limits the amount the handle will turn to have a code required scald gaurd. For best results, adjust hot to a point that is very uncomfortable but you can keep your hand under it.

rniyogi · Dec 30, 2008, 02:41 PM

Hi Doug,

Ok. Here is the issue. The plumber took out the temp. Control (white cogin - gear assembly), but still made no difference.

Question: By adjusting the gear assembly, does it allow the know to rotate beyong 270 degrees (beyond 9'o clock position)?

What else could I try ?

doug238 · Dec 31, 2008, 05:06 AM

Johnsmom, were you able to remedy your situation?

Rniyogiis there any valves or integral stops on your faucet? Does your faucet start with hot or cold when on? The cartridge may be reversed. Describe what happens when you turn the faucet on slightly, and then half, and then at 9:00. Do you have full flow?

rniyogi · Dec 31, 2008, 05:29 AM

[Hi Doug,

Here are the answers:

It didn't remedy the situation, the problem is still there.
Faucet start with clock with counter clockwise (270 degrees - fully hot)
At 6'0 clock position, it is off
At 3'0 clock position, it is cold
At 12'0 clock position, it is semi cold and warm
At 9'0 clock position, it is luke warm (which technically should be as hot as other faucets)

doug238 · Jan 1, 2009, 10:08 PM

Ok, let's brainstorm this thing. You have adequate hot water at the fixture next to it. You have removed the hot limit inhibitor. There are no valves in the hot line on the shower that are partially closed? You have full pressure and volume on the hot side?
These are the things that could cause lukewarm water on a hot line. Not saying any of these are the answer, but brainstorming. A leak on the hot water pipe. A t&p valve partially open. A faucet that is allowing a crossover and feeding cold water into a hot line. A prv [pressure regulating valve] that is on the hot side but no prv on the cold side [cold pressure higher than hot pressure]. A recirculating system that is allowing a crossover [it is supposed to have a check valve that does not allow it to go backwards]. Debris in the hot side that is restricting the flow of hot water. A valve that is partially closed.
Any of this sound familiar?

rniyogi · Jan 3, 2009, 06:24 AM

Yes, there is almost full pressure on the hot water side. Not sure about the valve partially being closed. The plumber says it could be valve too and suggested to change that, but want to get forum's opinion on this. Is it really going to help. Sombody said, drain the hot water heater once to remove sediments, but other faucets give good hot water.

If at all we have to change the valve, is it good to go with separate controls (one of hot and another for cold)?

No Hot Water in Shower - Moen Single Handle Faucet

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