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Burner for water wont shut off even when taps are not open

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  • Water Heaters Master
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Which gas water heater do you have???? How old? What brand? What have you checked so far? Otherwise we're guessing at the problem.
Check for water leaks.
Tear the tankless off the wall, and install tank type heater and avoid most issues.
Call manufacturer and pay for local service call.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/How-to-light-gas-water-heater.html
http://www.thetankatwaterheaterrescue.com/forums/forum3/
Gene

Posted on Jul 29, 2013

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1 Answer

Junkers manual gas hot water


What are you expecting to happen?

I assume the water heater and water inside it is cold (otherwise you would not be lighting it). You light the pilot. The main burner comes on and the pilot lights it. The main burner should stay on until the tank is hot, When the tank gets hot the main burner should shut off but the pilot stay on. If you draw hot water, cold water will run in and cool the tank. If yu do nothing the tank will eventually just cools off. then the main burner should come back on to reheat the tank.

Nov 05, 2013 | Water Heaters

1 Answer

When spark start and burner lights up and spark finish gas cuts off (cut off valves) and burner stops . Why is that.


Hi there may be a number of factors involved with this appliance,
1. if you are opening a hot tap/faucet only slightly there may not be enough water flow to keep the burner alight. try turning on the tap alot at first then decrease the flow to your required amount
2. there may be a blockage or partial blockage in your gas supply.
3. water may have entered the casing and got into the electrical componenets of burner jets
And lastly if your Rheem unit is past its warranty & you can't get a service technician out to check it, then your last resort would be to get a qualified person to have a look at it

Mar 09, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

Model Aquastar 250 is not running and is showing an error code of EA. What can be the problem?


  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 req

http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/250SXTechSupport/Troubleshoot/tabid/563/Default.aspx

Feb 03, 2011 | Bosch Water Heaters

1 Answer

Hi i have installed a few bosch gas geysers at our lodge in mozambique.The problem is that the water gets hot when we turn the water on then the heat just shuts off and the water gets cold after a short...


The problem with all that type of water heater is that once the hot tap is turned on sufficient flow must be maintained through the water heater to keep the main gas burner alight. If the heat adjuster is turned up to high, then the person using the hot water will turn it down to a low rate which means the main burner will turn off and result in cold water. Try setting the heat control to the lowest setting that still gives hot enough water. If you have a thermometer adjust control for a temperature of around 50 to 55 degrees Celcius. You may have to fiddle with fine adjustments to get the temperature and flow rates to maintain a constant output of hot water. You may still have intermittent problems. If the heater only supplies baths or showers you could set the temperatuer even lower (45 to 50) to ensure that the hot tap is used more than the cold which will maintain flow and therefore heat.

Nov 22, 2010 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

I have a Bosch AquaStar AQ-125-BNG tankless water heater. It has worked very well until recently. The problem: The hot water at the tap is turned off, the flame on the main burner keeps burning and...


there is a small dia copper pipe which has a thermal coupling on it the end of it sits in the flame of the pilot light,
if it fails which it does after about 25-15 months,it shuts down the gas burner

Jul 05, 2010 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

Water heater pilot wont stay lit


try cleaning the top of the pilot light jet if you can get to with small brush then blow it clean with a compressor.

Aug 30, 2009 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

Bosch AQ125BNG Burner goes out even though the


Often, this is the result of a restriction of exhaust gases. This type of hot water heater must be adequately vented, (per installation specs). I found this out after taking a number of cold showers. :^( Two years later, and still counting, no more problems. :^)

Jul 11, 2009 | Bosch Water Heaters

1 Answer

A trickle of hot water from taps, central heating ok


it sounds like your shut off valve might be bad even though it turns on and off by turing it doesn't mean that the washer is not stuck to the seat and not opening, try replacing the valve

May 18, 2009 | Water Heaters

1 Answer

Electronic water heater burner often won't light tho pilot's on


it sounds like you pilot lite is to far away from the burner, make sure that the burner is sitting in it;s purch, look thru the site glass it can be moved by hitting or bumping into the out side of the gas tubes on the outside of water heater, if not, the burner assembly may have soot on it. you might also want to make sure the filters are not clogged on the shut offs that will give it less pressure then it needs to make the unit come on,, write me , gary1121@aol.com

May 15, 2009 | Bosch AquaStar 125FXKIT-LP 125FX Liquid...

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