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Is it safe to replace the blown fuse which serves only my small hot water system?

Ten years without problem, blew a fuse today. It's an underbench unit which is wedged under the kitchen bench so without destroying the cabinet frame I can't access the front removable panel or model/serial numbers. Fuse has a ceramic case and is part of an old fuse box.

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  • 51 Answers

Fuses wear out over time even if you dont have short to cause it to blow. yes you can replace the fuse,just be sure to off the power to the box before you do.

Posted on Jan 06, 2013

  • LYNN HALL Jan 09, 2013

    Thanks Ben, you R my hero. I found fuse wire today (even Bunnings doesn't stock it) and changed it today with confidence and without disaster. Unfortunately still no hot water, but at least now I know I have to go to the expense of a tradie. U were the only one in the whole internet world to help. Thanks a million.

  • LYNN HALL Jan 09, 2013

    Forgot to say thanks to FixYa! Wonderful website and service.

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Where do I locate the fuse on the Noritz N-0631S. Can you also tell me what size fuse it uses and where it can be purchased.

Posted on Nov 23, 2013

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SOURCE: water doesn't stay hot PowerStar AE3.4

Are you using a single lever faucet? The install guide does indicate that you may need to reduce the input from the cold water side to ensure that water stays at a consistent temperature (see page 7 of the installation and service manual). Also, remember, this is a SMALL hot water heater. So if you're running for any length of time at full output, it may not keep up with you (see page 8 of the service an installation manual). I found the manual online at http://www.airwater.biz/images_templ/bosch-water-heaters-ae3.4-manual.pdf.

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SOURCE: GE SmartWater RO Filter Tank Leaking?

I had same system under my sink for same amount of time and have since then removed entirely for health reasons related to Ro Systems. Mainly the tanks becomes contaminated [alge build up]and my faimly had constant nagging stomach aches which took a long time to resolve untill we decided to disconnected and throw out our "beloved healthy RO System" and decided to install a bi annual disposable type filter system. If you are expereanceing this I would advise the same as for the leak ,There are so many connections under there and it is usually not the tank but the fittings in lines some where and the reason it looks like the tank is because that is the lowest point the leak has traveled. So check all your fittings and if you decide on simple water filter I will advise you.

Please rate. Thanks jj505

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Posted on Mar 29, 2009

mkh5094
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SOURCE: TRYING TO REPLACE MY OLD RHEEM WATER HEATER MODEL

I would say your water heater is from the fury series; new model number 82V52-2. I've included a link with my solution that you should take a look at. You could also look at water heaters of a different brand if this one isn't available in your area. Kenmore, GE, and Hotpoint are all very good brands of water heaters.

http://www.rheem.com/product.aspx?id=09DF2BDD-5E11-4D32-B574-84ACFB8A4619

Posted on May 25, 2010

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Stelrad ideal mexico boiler


Trying to look that unit up. I believe it is obsolete. IF there is an electric motor on this unit, I would check that first. Motors are the biggest consumers of electricity and they have moving parts. If there are no motors then you need to check any electric ignitors that are present. They step voltage up and can short out. This means that you should have some way to test things. Using something like a meter is good

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Electric Water Heater blows fuse, but only every few years


Your residential water heater is not 9000 watts. Or it would blow the fuse every day and melt the wire. Instead, you have dual-element non-simultaneous 4500 watt water heater.
http://waterhatertimer.org/How-it-works.html
http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html
Look at label for 'total connected watts'
http://waterheatertimer.org/images/Whirlpool-energy-smart-watt-rating-IMG_2600.jpg
25 amp breaker or fuse and 10 gauge wire is minimum acceptable for 4500 watt water heater.
http://waterheatertimer.org/Color-code-wire.html
Troubleshoot blowing breaker or fuse:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#trip-breaker
Why does it blow fuse once each year?? I don't know.
Fuses and breakers trip when overheating occurs on wire.
Each fuse or breaker is rated for heat, and over time, it will get hot and then cool and then get hot again ... this action weakens fuse or breaker.
To solve problem: install 3500 watt elements (and clean sediment out of tank). Wire will run cooler, and fuse will last longer. Whole fuse box will demand less power, and run cooler, and will last longer as a result. So there is less stress on electric service panel.
http://waterheatertimer.org/How-to-replace-water-heater-element.html
3500 watt element will heat water to same temperature, but takes longer. For example: 4500 watt heats 21 gallons per hour, while 3500 watt heats 17 gallons per hour.

Apr 28, 2013 | Water Heaters

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I have a vaillant eco pro 28 combi boiler. no constant hot water unless tap is on really low.


Oh some of these there was a small black heatexchanger just for hot water they some times block up . or it could be a blockage in the water section where it flows in .I know Valliant have a very good tech line and fitters who do house calls .

Mar 02, 2017 | Water Heaters

2 Answers

Rheem water heater rtg95dvn keeps blowing 3 amp fuses


Not for sure what your root cause was and I know it's a little late but I just suffered this same exact scenario on the same water heater. Storms came through, power went out, power came back on and the water heater keeps blowing the 3 amp fuses now. I removed all the cables and plugged them back in one at a time. When I plugged in the Fan Motor connector the fuses blew. Installed new fuses with the connector out, the Fan Motor was putting out 150 VDC through the connector port (on main control). I pulled the control from the unit and Q1 is visible blown and disintegrated on the control board. Obvious control design issue. I've ordered a new control and will put a surge protector on the heater now when the new control comes in. Very disappointed that this was not caught in controls testing within the manufacturers facility. New control is not very cheap. Half the cost of a new Heater. Hopefully the Fan Motor survived the high voltage with the fuses blowing. I'm putting this here for anyone else that suffers the same issue on this water heater or the Richmond equivalents as they use the same control.
rheem-water-heater-rtg95dvn-keeps-lig2cnfgd44b3pejpipwueov-2-0.jpg

Jul 31, 2012 | Rheem Tankless Hot Water Heater...

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Our Rheem gas water heater was acting finicky a few months ago so we called the manufacturer and they sent us a new/replacement kit for the Invensys WIPER Electronic Control & FV Sensor. We replaced...


You're probably in for a service call and/or possibly water heater replacement if unit is more that 5-6 years old.
Your water heater plugs into outlet. Check outlet with cheap circuit analyzer to make sure the unit is receiving correct polarity without line interference.
If unit is in the attic, then add more venting to soffit and roof so pilot is not being snuffed out by hot air. If unit is in basement, then open some doors and a window and see if unit needs more air.
Most gas water heaters require yearly cleaning and service.
Clean the combustion parts and tubes.
Clean the air intake.
Have gas company check gas pressure.
Open following link for possible illustrations:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

The problem can be bad gas control valve, air in gas line, low gas pressure, gas shut off handle not fully parallel with gas line, dirty combustion parts, lack of combustion air, improper venting. Or combination of all things. It's an electronic gizmo, anything can be bad or shorted, and repair may not last long.

Without a trained service technician to ohm-test the parts using correct service manual, then we are guessing at the cause.

Power vent water heater implies that you have side wall venting which must be replaced with another side-wall vented unit -or- it implies rapid reheating of water.

If water heater is more than 6 years old, you might be money ahead by installing a new one from local box store. Avoid the power vent and electronics. Local box store will have passive roof-venting type water heater BUT box store does not sell side-wall power vent. If your power vent goes up through the roof, then box-store variety gas water heater will work. Total cost $350 do-it-yourself for 40 gallon gas.
Or get 40 gallon 240Volt electric for $220 and connect to circuit breaker box. Requires no venting, and is easy to repair for years to come.
Or small 120Volt electric that plugs into outlet to tide you over until gas repairs can be made.
Look for scratch-n-dent models and always offer 10% off.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
Shower uses 5-9 gallons hot water.

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http://waterheatertimer.org/Water-heater-recirculation-system.html

If I understand correctly, you removed supply line that connects autocirc pump to the hot water shut off valve.
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I use rectoseal on threaded connections and tubular drain connections to ensure forever seal:
http://waterheatertimer.org/images/rectoseal-006-400.jpg

If brass part of pump is cracked, then autocir may be bad.
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Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on plumbing or any do-it-yourself project.
Fixya is always less expensive than a service call.

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What leads you to suspect that pilot blew out instead of another problem?
Fact that pilot will not relight, indicates other factors at play.

Open following link for Bosch troubleshooting resources including manual, and Bosch contact info:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Best place to start is your manual.
http://waterheatertimer.org/pdf/Bosch_10P-installation.pdf

1) Manual recommends 'cleaning by authorized person, never less than once a year.'
Tankless water heaters, and most newer tank-type gas water heaters, are highly technical and finicky devices that require continual maintenance, with tankless requiring 'yearly' maintenance while tank-type require 'periodic' maintenance.
2) Troubleshoot in manual says 'no gas supply' or 'blocked pilot' replace pilot injector

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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Well if you don't have no spark,have you check to see if you got power?If you do have power ,the turn the water on to see if it will spark.If not the Check to see if the fuses are blown insde the panel.Most of them have fuses on the power coming in.If got all of that then you proablly wil have to replace the igniter board.

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