Question about Noritz Water Heaters

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My noritz tankless water heater acting weird. I had a plumber come descale twice but still not heating properly. I have hot water in the am almost instantly, afternoon barely warm after running it for a long time. Then by night for my shower its back to instant hot!! Im so confused

Posted by Tammy McLain on

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1 Answer

Paul Carew

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  • Noritz Master
  • 3,534 Answers

This is a water temperature problem what controls your water temp is not working

Posted on Jan 21, 2021

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5 Related Answers

Anonymous

  • 2 Answers

SOURCE: Noritz tankless water heater not producing hot water

I called Noritz error code 16 is a overheat problem. Noritz say's to flush your coil with vinegar or CLR.
Use a small pump to recirculate the CLR or vinegar through the system for 45 minutes and flush with fresh water. This worked for me.

Posted on May 12, 2009

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gary1121

gary miller

  • 332 Answers

SOURCE: Whirlpool Energy Smart water heater not hot

I think some one mis informed you, the normal temp on any water heater from the factory is 120, it should not go above that for reasons of sevear burns, as far as it't smart part it's just a name, you will lose a couple of degrees just comming torm the tank to the faucets, the water heater will allways keep the temp in the tank at what ever it is set at, it doesn't have the brains or computer to know what time of day it is but when the cold water comes in to the tank it comes thru a dip tube that goes to aprox 1 inch from the bottom of the tank, if you take a long shower and do not have a energy efficant shower head you can use up to 5 gals, per min of hot water where an energy efficant one only uses 2.5 or less and still has the same pressure at the shower head, the temp in your water heater tries to stay at the setting it is at depending on how much is used at one time meaning washing machine, filling tub or dishwasher at the same time, it lets more cold in as the hot goes out and as you know it can only heat up so much at a time and the cold water is just going across the bottom of the tank, so the name is just that no diffrent then any other water heater unless you went to a tankless water heater.

Posted on May 29, 2009

Anonymous

  • 6 Answers

SOURCE: Noritz tankless water heater/dishwasher not hot enough to clean

You are doing everything you can. Your dishwasher probably isn't drawing enough hot water to activate the unit so opening the faucet and flowing more water will activate the unit. Just try to adjust the flow from the faucet to a point it, plus the draw from the dishwasher, will activate the unit. This will come with trial and error as I am sure you have already experienced. Also, open the dishwasher when it does get filled and check the water temperature. You might have the unit set at a low discharge temperature. Do you have a touchpad to control the water temperature adjustment?

Posted on Jun 10, 2009

Anonymous

  • 1 Answer

SOURCE: noritz tankless water heater gives error code 11

This worked for me in the same situation. There is a filter inserted into main gas/ water control valve that senses water flow restriction. The sensor is connected to the gas valve. If it senses inadequate water flow it tells the gas valve to shut down so the water in the heater won't boil. Very expensive part. If you do find the filter clogged, a sediment water filter shoud be install on the inlet side of the water piping.

Posted on Oct 13, 2009

Anonymous

  • 248 Answers

SOURCE: rheem tankless water heater error code C4 13??

check diaphrapm valve or micro/switch best of luck

Posted on Oct 31, 2009

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1 Answer

How to descale a noritz tankless water heater


1) Copy following links for general descaling resources for Tankless:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#de-lime

2) Add a comment with what you discover

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Jan 04, 2013 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

I have had this noritz for about 5 months. It has had some trouble coming on lately and the water is not as hot as it should be. I ran the water right out the bottom of the machine and it does not come...


it sounds like you have issues with scale building up in your heater. I would recommend performing a descale to remove scale deposits. Sometimes the scale blocks water flow through the heat excahanger; you may need to have a servicer dig the scale out of your main servo and mixing cylinder before performing a descale.

Sep 06, 2010 | Noritz 8.4 Gallon Residential Tankless...

1 Answer

I have a Nortitz natural gas water heater, model #N-063s-1. Acouple of days ago it stopped heating the water. what can I do myself to fix this matter. Thanks, [email protected]


There are many reasons a tankless heater will stop heating water. The first thing I would look for is a flashing red light on the burner indicator. The flash break down goes as follows

continuous blinking - typically means ignition failure or the unit is overheating; look for visible water inside the unit, have your gas pressure checked, or check the flame rod/igniter for buildup of debris

three blinks - typically indicates 16 error code; typically resolved by performing a descale

4 or 5 blinks - exotic error codes; for these you should definitely contact Noritz tech support

If there is no flashing light, first check your filter for debris. If the filter is clean, your flow sensor is probably stuck. Again I'd recommend contacting Noritz tech support to help you clean the flow sensor.

Jul 31, 2010 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

Getting error code 16. what does it mean and what


a 16 error code is typically caused by scale formation. I'd recommend performing a descale on the heater.

Mar 06, 2010 | Noritz 6.9 Gallon Residential Direct Vent...

1 Answer

I have a three year old home with a noritz tankless hot water heater. It's leaking and the plumber says the flue was plumbed incorrectly which invalidated my warranty. So, apparently I need a new tankless...


bull ****! . If the heat exchanger is leaking, it should be under warranty. If you have and improper installation that should be the responibilty of the builder or his plumber. You may have some labor cost, but not the entire cost. contact your builder

Feb 04, 2010 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

I have a noritz water tankless heater and hot water stopped. Red light blinking three times. Need help.


Three flashes typically indicates the unit is overheating due to scale. I'd try a descale initially and see if that remedies the problem.

Dec 27, 2009 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

Error code 14 shows on the remote for a noritz tankless lpg water heater. what does it mean?


This means the thermal fuse has broken and needs replacement. The thermal fuse is a white cord which wraps around the heat exchanger. It typically breaks if the unit is excessively dirty and sooted. Before the fuse is replaced you should make sure the unit is cleaned with compressed air and descaled.

Dec 10, 2009 | Noritz 6.3 Gallon Residential Tankless...

2 Answers

Noritz tankless water heater not producing hot water


I called Noritz error code 16 is a overheat problem. Noritz say's to flush your coil with vinegar or CLR.
Use a small pump to recirculate the CLR or vinegar through the system for 45 minutes and flush with fresh water. This worked for me.

Jan 04, 2009 | Noritz 6.9 Gallon Residential Direct Vent...

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