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Titan SC2 Tankless Water Heater

I have no hot water..... Help.

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  • 9IZS Nov 28, 2008


  • wanch Dec 22, 2008

    Mine is also about the same age, and has quit working. I opened it up and one of the wires that goes to an element burnt/melted. You can order replacement parts, but i think it'll just end up breaking again.

  • Pittbullds Dec 26, 2008

    I have had mine 8 months it has been great until now only cold water. No hot an just to think i had to spend all that money to plumber.Now this damn thing dont work I had to plumb and rewire for it.
    Now i wish i would have used a tanked water heater.
    Thanks TiTan! what a saving this has been!

  • herron_m Apr 14, 2009

    Does anyone have the wiring diagram for one of these N-120's.
    Need the wiring diagram for a Titan N-120 tankless water heater. I had to take mine apart to clean deposits out of it. I need to know which wires go where on the control board and which wires go where on the heating elements.

  • Fred A Jun 07, 2013

    It sounds like the thermostat, Niagara has a tech line that you can call. Mine is over 8 years without problems. It also sometimes depend if you get a pro to put them in.


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My Titan water heater stopped working. There is a single light that comes on when the
water is off but no hot water.

Posted on Apr 11, 2010

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I agree, Niagara needs to solve this problem. I ended up sending my unit back to them to have all the electronic components replaced for $50. When it gets returned to me I'm going to open it up and make sure they replaced everything. I'll probably also replace the wire with a larger gauge as you suggested. When i emailed the company my concerns about this problem, the rep that answered my email stated he had never heard of a fire or anything of that nature occurring with a Titan, in the 7 years he's been working with the company. And "it sounds like a fluke and am confident it will be repaired properly". Here's the phone number he gave 305-876-9010 for me to discuss my concerns personally with someone. I think i'll email him back and referr him to this site as well as others i have come across while researching this problem. Seems like 3 years of regular use is about the lifetime of the heater.

Posted on Jan 12, 2009

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Same thing happened to me. I'm replacing the element and upgrading from 12 gauge wire to 10 gauge. If you do this make sure you get wire with 105C rating. I'm still waiting on the element so I don't know if this is a long term solution. Sounds like a flaw that needs to be fixed by Niagara.

Incidentally I bought mine over 3 years ago. I have another that I will inspect shortly to see if it has similar problems.

Posted on Jan 12, 2009

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Niagara has a tech line that you can call, it sounds like just a matter of reseting the thermostat. I have had mine for 7 years, it also depends a lot if you get a pro to put it in.

Posted on Jun 07, 2013

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I have had mine 3.5 years and worked great until then. Lost all lights yet had power going to unit. Trying to get schematic. I suspect the SCR's. They are cheap to buy from their parts list. Thanks for phone number. I will ask them what give the power lights to the Green light and the red SCR lights. I had bought a spare just for this. Didn't want to have to be without hot water.

Posted on Dec 25, 2010

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Same thing here..only got a year and two months out of mine...if you are reading this and considering this unit...dont mess with it...u wont get 2 years out of the unit..please read everything about it on the net..u will see only about 15-20 percent of the people have anything good to say about it. the company has pitiful to no service, the heaters electronics are warrantied a year and that seems to be about the life of it..they say a 10 year warranty on the case..i would give a 10 year warranty on a piece of tin, too- wouldn't you? i read a lot of negative stuff about it, shortly after i installed mine. I didn't want to send it back because the wife and kids were so happy with the endless hot water and it took 75 extra dollars to change over from the tan. after it took two weeks to convince the wife this was the way to go, I didn't want to admit- I was having my doubts a few weeks into it, after reading some blogs on the net.I finally forgot about the negative and convinced MYSELF,"we would get better service than everyone else if we took extra good care of it and did'nt crank it up".. well a year and two months to the day- here it is- I am without hot water and searching the forums for a clue how to fix this POS. these people here that got three years out of theirs are doing great compared to everyone else.

Posted on Oct 12, 2009

2 Suggested Answers

  • 2 Answers

SOURCE: I have a Titan tankless hot water heater. I get ho...

try opening the faucet and the shower at the same time. some shower heads don't draw enough water for the tankless to fire.

Posted on May 22, 2010

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Posted on Jan 02, 2017

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Related Questions:


Water Heaters go Tankless

You may or may not have heard about these cool little devices by now, but if not, here is the low down.

Tankless water heaters are used all across Europe and come in several varieties.

1. Natural gas fired on demand Tankless
2. Oil Fired Tankless
3. Electrical Tankless

The most prevalent among these is the gas fired version.

In America, these energy savers are just starting to gain a foothold.
Leaders in the field are Titan, Bosch, Rinnai, and Noritz to name a few.

The real benefit to Tankless over Standard water heaters is that you never waste energy heating water that sits in a tank cooling until you use it.
If you have a 20 to 80 gallon water in your home, it will run night and day at odd internals maintaining it's own heat.

What this means to you is that in a typical day, whether you use hot water that day or not, is that your water heater will cycle many times to maintain it's heat whether the hot water is used or not.

Some people try to drive this wasted energy use down by wrapping their water heater with thermal blankets, or by insulating the water heater closet itself, which has only proven to be partially effective.

Also bear in mind that these Tankless water heaters are quite small compared to the Tank version, some are as small as 18 by 12 inches.
This means that your old water heater closet can now be used to store your valuables without fear of starting a fire.

A further waste of energy occurs when the exhaust heat is funneled to the outside when it could have been diverted to a heat exchanger or other energy conservation device.

Tankless water heaters perform far better in energy use than the old school, Tank type water heater by simply heating water exactly when it is needed, then shutting down when the hot water tap is turned off.
What this means for you, the consumer is that you will have hot water any time you need it, and the water will remain hot as long as the hot water tap is opened.

There are virtually no cold water periods for a tankless water heater.
You have an endless stream of hot water, without wasting a single BTU of heat, kilowatt of electricity, or ounce of natural gas.

The real surprise here is that nobody really knows just how much their utility bill is being affected by that Tank style water heater until the first utility bill arrives. The savings are immediate and significant, both in terms of less energy consumption and Dollars saved.

Let me drive that point home in real life terms.
You definitely will NOT use MORE energy after your install.
You will most Certainly use less!

There are several typical applications for Tankless systems in any common home.

1. Low Volume On Demand heaters can be installed under the sink.
2. High Volume Tankless Whole House heaters supply the entire home.
3. On demand Budget Tankless heaters can be located at the sink coupled with whole house heaters for faster hot water delivery to eliminate cold spots. These are the most popular for the beginner Tankless solutions.
Your cold water pipe is split from the cold water valve itself to the Tankless heater under the sink as well as the cold water tap. The hot water outlet is then connected to the Tankless water heater under the sink to provide instant hot water, eliminating the need for a hot water tap from the main hot water supply. This results in even less energy waste since the smaller Tankless heater uses less energy than a whole house Tankless unit.
4. On demand Tankless heaters use virtually no energy to heat unused water. When the hot water tap is off, the Tankless unit is off.

The price point for these Tankless models is fairly competitive against a standard water heater, but can sometimes be more expensive depending on the model and water volume you require. What matters most though is that these Tankless versions begin paying for themselves the day they are installed.

My final word on this is simple.
Most other countries in the world have been using tankless water heaters for a very long time due to natural gas and oil prices. Their adoption of these devices is a necessity rather than a purchase of convenience.
In terms of technology, America falls close to last place in this field, as well as many other areas where energy consumption is a factor.

When you purchase a Tankless water heater, you not only save money, but you also help the environment by wasting less energy to heat the same amount of water you consume on a per use basis. You will also use somewhat less water since you no longer have to wait for that cold water to leave the tap so the hot water will finally flow.

The choice is yours.
Choose wisely!

Please Vote for this Tip if you found it helpful.
Bob S.

on Mar 25, 2010 | Plumbing

2 Answers


It's doubtful your water heater unit is the problem. There is simply no reason for it to only work on sinks unless some how the pipe size was drastically reduced coming out of the unit so sinks got plenty of hot water but the shower does not. Take a second look at the installation. The pipe should not be less than 1/2" coming out. If that's OK then consider a clog or valve problem.

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I have a Titan tankless hot water heater. I get hot water from the faucets but not in the shower. Do you have a solution?

try opening the faucet and the shower at the same time. some shower heads don't draw enough water for the tankless to fire.

May 20, 2010 | Kitchen Appliances - Others

3 Answers

Scr2 titan water heater. No hot water. Both red

On the left side of the board there is a 10K 5Watt resistor that gets loose from the board because of overheat and it needs to core solder back with soldering iron.


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