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SCR4 not heating water

Titan SCR4 has stopped heating water. The green lights are on when not in use and red lights come on when the hot water faucet is turned on and water flows through the heater but is still cold.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Da Brain
  • 11 Answers

SOURCE: On demand, tank less water heater

THE WATER IS RECIRCULATING IN THE UNIT. MAYBE CAUSED BY THE ACID. TRY INSTALLING A BACK FLOW PREVENTER

Posted on Oct 27, 2008

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  • 1 Answer

SOURCE: Water is either hot or cold - no in between.

I found a way to get warm water in the shower, but I'm not sure it qualifies as a solution. After trying everything else I thought that maybe when I was feathering the faucet in the shower toward the cold side so I would get warm water that at a certain point it blocked the flow on the hot water side enough so that the sensor in the hot water heater sensed there was no demand in the line and it shut the water heater off. To test this, I went to the kitchen and turned the kitchen sink faucet all the way to the hot side and then turned it on so that I got a small flow of water. I waited for the water to get hot to be sure the hot water heater was working. Once it was hot, I left it running to keep demand in the line and then I went to the shower and turned the faucet on. When the water got hot I started feathering the control towards the cold side and soon I had warm water. So I think I'm right in that the sensor in the hot water heater was shutting the water heater off when the demand in the shower was lowered to a certain point when I was trying to adjust the water temp in the shower.

So now I can get warm water, but it means I have to leave the hot water running at another fixture in the house to create a false demand in the system so the hot water heater doesn't shut down. Is there a way to adjust the senor in the hot water heater so that it will stay on when I'm using the shower only, so I don't have to waste water by running another faucet when I want to take a shower?

Posted on Nov 29, 2008

  • 11 Answers

SOURCE: BOSCH AQUASTAR 2400ES NATURAL GAS TANKLESS HOT WATER HEATER

Q. FA - Gas leakage error, gas valve circuit not closing properly
A.

  1. Disconnect power supply cord and check wire connections on gas valve and the two connectors on the control board.
  2. Flow water out of a hot water tap above the minimum activation point of .8GPM. Measure voltage at the gas valve wire connector. The connector should measure 24VDC between the left pair of wires and 24VDC between the right pair of wires when the unit is operating. If voltage is not correct, contact Bosch Water Heating for further instruction.
  3. Gas valve may be defective, contact Bosch Water Heating for further instruction.
Q. EA - No flame ionization detected with water flow
A.
  1. Verify that all manual gas shut off valves are open.
  2. Verify gas type (See Fig. 2 in installation manual) corresponds with the type of gas supplied to the heater.
  3. Reset error code and open a water tap to cycle the heater in an effort to purge air from gas line (especially on new installations). Cycling hot water tap on and off multiple times may be necessary. If heater still faults with EA error code, have a licensed gas technician properly purge air out of the gas line leading to the water heater.
  4. Verify the three yellow wire connections to the set of electrodes (underside of the burner assembly) are secure.
  5. Verify gas pressure meets specifications outlined in chapter 3.8. See Bulletin TWH-G2-03.
  6. Verify venting meets specifications outlined in chapter 3.6 of the installation manual. Improper venting may cause premature failure of the flame sensor rod.
  7. Observe inside the viewing window of the heat exchanger when a hot water tap is opened. Sparking should be followed by a steady blue flame. If not, Call Bosch Water Heating with observations. Readings from above gas pressure test will be required.
Q. C1 - Fan rotation too low on startup
A.
  1. Disconnect power supply cord. Check wire connections on back side of fan and the two large wire connectors on the control unit. Removal of lower access panel on control unit is necessary to access connectors.
  2. Verify that supply voltage is 120VAC and is properly grounded.
  3. Verify that venting meets specifications outlined in chapter 3.6 of the installation manual. Long vent lengths, venting with more than three elbows, blocked vent or combination venting may cause this failure. Verify backdraft flapper inside flue gas collector is not stuck shut.
  4. Check gas pressure. See Bulletin TWH-G2-03. Low gas pressure may cause the fan to change its speed to meet desired temperature.
  5. Possible defective control unit. Call Bosch Water Heating for further instructions.

Posted on Mar 15, 2009

  • 2 Answers

SOURCE: Titan Tankless stopped working this morning.

I have the Titan SCR2 N-120. You may have a different model. On mine if you are looking at it just a inch below & 1 inch to the left of dead center will be a round black sticker(it has some white lines at&t's logo). there's a pin hole in the middle of the sticker that you can poke to reset. Or turn the breaker off then take the 2 screws out of the top of the unit. It's just a thin metal cover that you can pull back & look inside. You'll see a red circular button thats the reset button. It's right behind where the hole I was talking about & what gets pushed in. you'll also be able to see if anything burned out & can get replacement parts at titanheater.com . One of my heater elements had burn/ melted & I've ordered a replacement. It was $17 + $11 s&h but still cheaper than $200 new unit from e b a y. Best of Luck

Posted on Sep 05, 2009

SOURCE: scr2 titan water heater. No hot water. Both red

look in in user manual and the lights should be codes to whats wrong

Posted on Apr 29, 2010

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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.

Apr 28, 2010 | TitanNet TITANTANKLESS. COM PRESENTS THE...

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We used to have hot extremely hot water in both bathrooms. One day, the water became warm and ultimately cold in one of the bathrooms. Now, the water is also freezing in the bathroom where the water used...


Your check-valve has most likely failed at the switch.
The flow check valve works by opening when you turn the water tap. When it opens it closes a switch which turns on your heating elements. When this switch fails you will still have water flow, but no heat. Titan has parts for this but you will need to call their service Dept.
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or call
Toll free support pesonnel hours (EST): Monday-Friday: 9:00am - 5:00pm
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They also have an online support operator during normal business hours here
http://www.titanheater.com/livehelp/livehelp.php?department=2

Mar 24, 2010 | TitanNet TITANTANKLESS. COM PRESENTS THE...

1 Answer

When turn on the hot water only the top red and green lights are on and the water is not hot


is it wired correctly..check all your wiring
if its a new install call the place of purchase or the manufacturer

Feb 05, 2010 | TitanNet TITANTANKLESS. COM PRESENTS THE...

2 Answers

Titan Tankless stopped working this morning.


I have the Titan SCR2 N-120. You may have a different model. On mine if you are looking at it just a inch below & 1 inch to the left of dead center will be a round black sticker(it has some white lines at&t's logo). there's a pin hole in the middle of the sticker that you can poke to reset. Or turn the breaker off then take the 2 screws out of the top of the unit. It's just a thin metal cover that you can pull back & look inside. You'll see a red circular button thats the reset button. It's right behind where the hole I was talking about & what gets pushed in. you'll also be able to see if anything burned out & can get replacement parts at titanheater.com . One of my heater elements had burn/ melted & I've ordered a replacement. It was $17 + $11 s&h but still cheaper than $200 new unit from e b a y. Best of Luck

Jul 27, 2009 | TitanNet TITANTANKLESS. COM PRESENTS THE...

3 Answers

The Titan 120 will not turn off. Is it the thermostat?


It sounds like maybe there is a build up of sediment. You can clean that out. Contact Titan tech support like at 888-Titan-80 or email then at Titantech@engnieer.com

Jul 02, 2009 | TitanNet TITANTANKLESS. COM PRESENTS THE...

1 Answer

Water heats for about 3 seconds and goes cold


Take the cover off and look for reset that has trip.If you can't find no reset turn the power off and wait for five minutes,turn on and turn water on also to see if you get hot water.

Mar 14, 2009 | TitanNet TITANTANKLESS. COM PRESENTS THE...

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