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How many kilowatts should a hot water tank pull or use when heating up?

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  • lowrysaa
    lowrysaa Feb 21, 2012

    Before the hot water tank started heating up I was using 2.78kws, when the tank started heating up it jumped to 12.4 kws. Is this normal?

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Some heaters have two 4500 heating elements thats 9000 watts or 9kw,s which would need 240 volts at 30 amps.breaker.

Posted on Feb 21, 2012

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Posted on Jan 02, 2017

ftw1952
  • 10319 Answers

SOURCE: gas hot water tank. burner lights,water doesn't

gas regulator gone bad

Posted on Jan 16, 2010

SOURCE: got storage heating and hot water tank .lights on

1) You report that your tank-type electric water heater has lights on the controller.
Please look at label on side of tank to get brand and type of water heater.
Add a comment with all information you have, including description of product.
This will let expert possibly find a manual, and read manual alongside you to assist as you fix water heater yourself.
Keep in mind that expert cannot see your water heater, and that many things cause water heaters to malfunction, and that troubleshoot section of product manual is good place to start.

2) Search manufacturer's website for product manual so you can fix water heater yourself.
http://waterheatertimer.org/Water-heater-manufacturers.html

3) If you have electric water heater and don't want to add a comment with identifying information, then look at following page for do-it-yourself troubleshooting:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

4) If you have energy smart water heater, you can access information and manual at following link, and possibly fix water heater yourself:
Product manual link shows on page, and gives phone number.
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html

5) If you do not have tools or know-how to fix water heater yourself, then call a plumber.
Plumbers are expert at fixing water heaters.

6) Post question of professional water heater forum, to double check anything a plumber, friend, or fixya expert says:
http://www.thetankatwaterheaterrescue.com/forums/forum3/

7) Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Posted on Feb 15, 2011

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I understand that you are having a problem with your hot-water tank not producing any amount of hot-water. I would suggest that you turn off the cold water supply to your hot water tank and drain the tank and see how much water comes out of it.

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The next thing you need to do is find out whether you have 240v to the bottom element....the top will not heat till the bottom is satisfied...
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