Question about Noritz 6.3 Gallon Residential Tankless Water Heater - N-063S

3 Answers

Water Heater Won't Fire up

I have a Noritz Tankless Water Heater... it won't turn on.  no blinking light. I have power to the unit but still no spark... think maybe there might be debris clogging the unit? need help!

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I had the same problem with my Noritz 751M, I called the plumber and after he talked with Noritz and ran a bunch of tests (for $150) he told me I needed a new unit ($4,000 installed). They implied it was my fault cause I never flushed it over 8 years. They were unable to tell me the flow rate though (which should be very low if scale was my main issue). I decided to take over as I am very handy and an engineer. Here is what I found:

1. The unit is 8 years old and was never descaled (orig installer did not install the bypass valves nor tell me to flush annually). So, I installed the valves ($70) and bought a pump/hoses/bucket/Zep CLR ($150) and did the flush. There was tons of flow thru the exchanger (I did not measure how much).

2. I called Noritz myself (they were very helpful) and cleaned up the igniter rod with sandpaper (it was very discolored due to 8 years of sparking). This did the trick and my unit fired up but it was very sporadic (sometimes yes & no). The difficult part is that while the igniter is installed you CANNOT actually see (nor definitively hear) the sparking. It seems like sometimes the spark happens (unit fires right up) and sometimes it doesn't (unit cycles and ends in a Code 11 after a couple of minutes).

3. INFO: Per the field manual (Search google for: docslide.us_noritz-field-manual-2009) you can read the flow rate data from Data #14 on the remote control. It needs to be >0.5 GPM for the sparking to happen which then triggers the gas flow. You can live monitor Data #14 by following the instructions in the field manual on pp.46-47. The startup logic is: Flow > 0.5 GPM then Sparking Happens then the Gas Flows then Flames start in the combustion chamber


4. I got mine to successfully start by loosening the ignitor rod PN 101 and jiggling it while still inserted into the combustion chamber (holding it with insulated pliers while still against the case) - somewhat dangerous and startling when after sparking the gas flows and flaming starts but not too bad.


5. BOTTOMLINE: I got it working but it would not "always" light (even though my flow was always >0.5 GPM). Noritz told me that it is probably because I have the older black ignitor (PN 126 = EHEJ003). They have a new and improved gray ignitor (PN 126 = EMUJ004). I ordered it with a couple of other ignitor parts for a total of $35. I just installed them and they work great - ignition all the time from every faucet.


6. ENDGAME: Order the new ignitor parts, verify your flow rates using the field manual. See the pics below for some insight. I spent 20 hrs troubleshooting and wanted o share. If you want more info just email me at: tmorganjets@gmail.com

You can monitor the flow rate and flame by doing a skype (PC at faucet to Phone place in front of Noritz) - you will be able to see the Noritz turning on (with flow rate displayed) each time you turn on a faucet - it is very helpful for troubleshooting and verification
Water Heater Won't Fire up - water-heater-fire-up-2vdytplxgocwcfcu3oen5i2x-1-0.jpg









water-heater-fire-up-2vdytplxgocwcfcu3oen5i2x-1-20.jpg

Posted on Feb 05, 2016

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 73 Answers

There are a few things you'll want to check:
1) make sure you have 120VAC at the outlet
2) measure voltage across the blue/white and black/white wires connected to the gfi (black box inside the unit on the bottom left or right hand side). You should read roughly 100 VAC on both sides. If you don't read voltage on the black/white wire pair, then you gfi is tripped. Look for moisture that might be shorting the gfi.
3) If the GFI checks out ok, you probably have debris clogging your flow sensor

Posted on Aug 15, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 547 Answers

Could be thermocupple

Posted on Feb 17, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a Noritz tankless water heater (model n-132m). I am getting an error code of 71. What does that mean?


The Noritz Manual shows fixed for the following error codes:
11
21
90
99
For all other codes this is the recommendation:
Contact our sales agent if:
• Any other error code appears.

Sep 12, 2014 | Noritz Commerical Tankless Water Heater...

2 Answers

What is code blinking 20 on noritz tankless hotwater heater N_069M


The error is a HIGH LIMIT THERMAL ERROR. That means Calcium buildup has appeared in the unit. It is also called scale. To clear the error you have to power it off. That is done by the circuit breakers. You should descale the unit first though.

Jul 26, 2014 | Noritz Water Heaters

1 Answer

Code 73 on a noritz tankless propane water heater


73 code is a circuit board error. It typically occurs if you connect or disconnect anything in the heater with power on. Try disconnecting electricity for 20 seconds to reset the unit. If the problem continues, you may need to replace your circuit board.

Apr 08, 2011 | Noritz 7.1 Gpm Propane Lp Gas Tankless Hot...

1 Answer

I have a natural gas eco Sense tankless hot water heater.I will turn it on and it will work fine. then I shut it off and if I turn it back on I will get an error code c2 will blink then 11. I will then...


try cleaning your spark rod inside the unit and the other rod next to the spark rod on the side of the unit. Takagi use a emery cloth, rheem brass brush, noritz a emery cloth. but make sure that both of the rods that are in the flame chamber are very clean. It miss reading because of build up on the rods.

Oct 05, 2010 | Rheem EcoSense by 4.2 GPM Tankless Water...

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, lynnatheana@hotmail.com


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

Noritz f 76 error blinking f 76 and on off light blinking at the same time. Everything works fine turned on and off hot h20 it goes to burner on 120 and then goes back to blinking f 76 after burner...


F76 is a communication error between two quick connected heaters. To clear the code, disconnect power from both heaters, wait 20 seconds, then reconnect power.

Apr 23, 2010 | Noritz 6.9 Gallon Residential Tankless...

2 Answers

After water to house was shut off, my Noritz tankless water heater is on but won't produce hot water. On the unit, the light indicating that the burner is on stays off now.


you probably had debris get into the filter or flow sensor when the water was turned back on. I'd recommend checking the filter first and if that doesn't work, call Noritz Tech support to help you with the flow sensor.

the filter is a black plug located on the cold water line (labeled cold on the bottom of the unit). It points torwards the left.

Apr 14, 2010 | Noritz 7.1 Gpm Natural Ng Gas Tankless Hot...

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...

2 Answers

Water Heater Won't Fire up


does the fan come on? this has to happen before it will even try to start if it doesn't your problem goes farther into the unit,, normal pracess if the fan then the ignitor then the flame, It could be in the circuit board most people that have gone with the tankless don't clearly ask the question but that is normal, but if you could clearify the procedure of what it is doing to this point i could be more helpful to you---- e-mail me what is happeing diffrent then what it use to do gary1121@aol.com

Jun 01, 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...

Not finding what you are looking for?
Noritz 6.3 Gallon Residential Tankless Water Heater - N-063S Logo

1,353 people viewed this question

Ask a Question

Usually answered in minutes!

Top Noritz Water Heaters Experts

Jeff Caskey

Level 1 Expert

20 Answers

Christopher Keene

Level 2 Expert

201 Answers

Mack Baxter

Level 3 Expert

381 Answers

Are you a Noritz Water Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...