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Water may stay hot for 5 minutes then gets cold. water heater often blows breaker or pop out switch.

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I suggest taking 30 minutes and testing water heater parts.
Right away we know 2 things:
-Electricity to heater is good.
-Upper element is receiving power because you have some hot water. If upper element was burned out, you would have no hot water.

That leaves 5 suspects:
Upper thermostat.
Lower thermostat.
Loose or shorted wire.
Upper element shorted to ground near center of element.
Lower element shorted or damaged in some manner.

Buy $10 milti-meter from Home Center or hardware
When test calls for testing voltage, rotate multimeter dial to 240-250-277 VAC.
When test calls for testing elements or continuity, rotate multimeter dial to Ohms.
Take 30 minutes and go down page.
Test will identify problem(s) and show how to fix it yourself.

Add a comment for more free assistance.
Also take advantage of fixya phone service.
For a price, fixya expert speaks to you via phone while you work on water heater.

Posted on Jan 02, 2011


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We just installed a hot water heater that's

1) Test elements, and if elements are good, then replace both thermostats.
Takes about 20 minutes. Power is off.

2) Label on side of water heater shows volts and watts.
For 4500 watt elements, you need 30 amp breaker and 10 gauge wire.
Move water heater wires to different same-size breaker.

3) Open the links and do the work, or call plumber to do work, or call manufacturer for warranty coverage.
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Powerstar 115 tankless tripping reset ontop of #2 heat chamber #1 does not get overly warm mainly because of incoming water temp. but #2 seems to be heating after water flow stops to hot to touch and...

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We have installed a Lowboy L56 50 DOLS 1026T449635. The breaker is new and is a 30 amp. The wire is 10 gauge. The wires aren't crossed and each shows 120 volts when tested. The panel shows 120 on each...

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1 Answer

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Replace the melted part.

If tank is popping breaker, then the melted part has a short circuit.
When replacing thermostats, I usually replace both of them

There are 5 basic parts to electric water heater.
Electricity to water heater.
Upper thermostat
Upper element
Lower thermostat
Lower element
It sounds like electricity is good.
Elements are probably good if just replaced, but one of them could have a short.
Thermostat is melted, so replace it and see if it restores hot water.
If not, then take 40 minutes and do complete troubleshoot as shown in link above.

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 timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

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