Top 20 Noritz 6.9 Gallon Residential Tankless Water Heater - N-069M Questions & Answers

you need to test the elements and stat for heatert

Do you have a well our on city water? Check in coming water pressure make sure it is not over 60psi

EC 71 usually means you are using a battery backup that doesn't produce a pure sine wave. OR you recently had a power outage and it shorted the circuit board. if you have a battery backup try unplugging that and see if it works okay. If not, just call Noritz for a replacement c/b.

Turn off your incoming cold water to the tankless. (you should probably do the same with your hot water out line just in case). find the black cap that screws sideways into the cold water connection on the bottom of the unit. unscrew the black cap. the filter is supposed to be attached but it almost always comes off. grab a screw driver and stick it in the hole that the black cap was covering. angle it and drag the filter out. you may end up putting a hole in the filter this way but it doesn't matter if you are replacing the filter anyways. once you pull it out make sure you have a little rubber washer on the new filter or else transfer from the old one. the new filter should actually attach itself nicely onto the black cap so once you've removed the old one all you have to do is screw the black cap/filter combo piece back onto the cold water connection and you're done. I suppose I should mention you will want to have a bucket under the pipes and everything because your unit will empty all the water that was in the unit out of that hole.

I feel your pain. I am experiencing the same issue which started about 3 weeks ago. First it happened twice that first week and we discounted it. Now that my heater has been flushed the same issue is occuring. I called Noritz 3-4 times now and they are saying that I may have high manollowifold pressure and should have that checked. FollowUp: Plumber determined my Natural Gas inlet line was too small. He Tee'd off before my manifold to other appliances and fed with a 3/4 line. Issue resolved and it has been trouble free since. (Updated 2/2017)

It is a are intake problem what happens is you get frost cristal bildup in the airintake you could take the front cover off dering the winter and you wont have the problem.

F76 is a communication error. It usually occurs if you connect or disconnect a quick connect cable or remote control when the tankless heater is connected to electricity. (If you have a quick connect system, make sure you only have 1 remote and 1 quick connect cable.) To get rid of the code, try disconnecting electricity for 20 seconds, reconnecting electricity, and turning the remote on. If the code returns, you may need to replace your quick connect cable, remote cable, or even remote control

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.

is there a check valvle on hot water side of heater,a flow restriction of some sort, water pressure to the heater, a filter in the line, line pressure in the heater kicks out burner, when you turn on the water, line pressure drops, heater comes on, when you turn on water in other part of house, heater should not fire, so there has to be a check valve somewhere,in heater?

It sounds like your GFI is tripping. There are two common reasons for this to happen 1) plugged into another GFI 2) moisture on the gfi. I'd look for evidence of a water leak which is tripping your gfi. Look for puddles, water spotting, water hardness, etc.

1/ check overheat stat 2/ check fan esp the little hose at the fan area for pinhole best of luck

If the unit is functioning properly, then you need to contact your utility company to see about upgrading the size of the gas line and meter to your house, and possibly the lines IN th house. It may be cheaper to go back to a tank type water heater despite the potential energy savings with a tankless.

Call the manufacturer to order one. It should be anywhere from 8-11 dollars. The manufacturer's number is usually printed on a sticker on the heater.

Remove the bird's nest in the flue. The 10, 59, 90 and 99 error codes indicate that a Noritz heater has experienced a combustion abnormality. In most cases, it is the result of an obstruction in the heater's flue. Examine the flue to see if it is blocked by debris and clean if necessary.

How To Resolve The Seven Most Common Noritz Tankless ...

Noritz https://www.noritz.com > Blog Nov 16, 2015 - This error code involves a breakdown in communication between two tankless water heaters using the Quick Connect Cord. It can occur when more ...

Troubleshooting Noritz Tankless Water Heaters and Error Codes

home-water-heater.com https://www.home-water-heater.com > noritz-error-co... Error code 90 and 99 ... Action: Check for the obstructed venting, improper gas burning (flame shape and color change). Ensure the water heater gets the ...

Error Codes for a Noritz Water Heater - Waterheatertimer.org

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For a Noritz tankless water heater, error number 78 indicates a problem with the fan motor. The instructions below will help you clear the problem number 78 on a Noritz tankless water heater:

1. Turn off the power to the tankless water heater by either disconnecting it or switching off the circuit breaker.
2. Verify that the fan motor is clear of any obstructions or debris that may be preventing it from operating properly.
3. Check the fan motor is receiving power by measuring the voltage across the fan leads with a voltmeter. Verify that the electrical connections to the fan motor are secure if there is no voltage.
4. If the fan motor is broken or not operating properly, it may need to be replaced. For further assistance with the repair or replacement of the fan motor, you can contact Noritz technical support or a certified HVAC specialist.
5. After resolving the issue with the fan motor, switch off the power to the tankless water heater for at least 30 seconds before turning it back on. This will clear the error code and restore normal operation to the device.
6. If you are unclear or uncomfortable with any of these processes, you should seek the aid of a certified HVAC specialist or Noritz technical support.

Error Code 20 on a Noritz tankless water heater (model EZ98DV) is typically associated with an issue with the "priority" function, which is a feature that allows the water heater to prioritize certain uses of hot water over others. When the "priority" light is flashing and error code 20 is displayed, it typically means that there is a problem with the priority function and it needs to be reset. To fix this issue, you can try the following steps:

1. Turn off the power to the water heater by turning off the circuit breaker or removing the fuse.
2. Wait for about 10 seconds and then turn the power back on.
3. Press and hold the "priority" button for about 5 seconds, until the "priority" light turns off.
4. Turn the water heater back on and check to see if the error code has cleared and the "priority" light is no longer flashing.

If the error code 20 still appears and the priority light is flashing, it's best to consult the manual or a professional technician to diagnose the problem. It's important to note that the error code 20 can also be caused by other issues such as, faulty thermistor, faulty thermistor harness, faulty PCB, etc. So, it's best to get it checked by a professional.

Replace the circuit board, or call a technician to do it. No one repairs field replaceable subassemblies any more.

ask Noeitz

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

I searched for that error number 903 using https://www.google.com and saw several fraudulent sites, so beware. There is a similar error number 90 mentioned several places, but that error requires a technician to repair it as it may be dangerous to do it yourself. Noritz in the United States has a search feature to find a technician if you need one. https://www.noritz.com/home-owners/find-a-servicer/