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Water heater problem.

mngundog

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Apr 25, 2011
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1,308
Location
MN, in the sticks, U.S.A.
15 year old electric water heater 45 gallon(?). Almost overnight it seems like the temp went way up (initially), while at the same time the quantity of hot water reduced roughly a third. So while always use to be able to fill a bathtub 2/3 full of relatively hot water, now it runs hot right away and is ice cold at the halfway point. So I'm at a loss. Any thoughts?
 
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gmcgeo

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Mar 11, 2019
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3,701
15 year old electric water heater 45 gallon(?). Almost overnight it seems like the temp went way up (initially), while at the same time the quantity of hot water reduced roughly a third. So while always use to be able to fill a bathtub 2/3 full of relatively hot water, now it runs hot right away and is ice cold at the halfway point. So I'm at a loss. Any thoughts?
how many times have you drained the tank of the sediment that is at the bottom?
 
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mngundog

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Apr 25, 2011
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MN, in the sticks, U.S.A.
how many times have you drained the tank of the sediment that is at the bottom?
It's been years. And if it was a gradual thing, I would've thought that, but it came on pretty quickly. I've also on my own well in the country, so I have sediment. I know it's something that should be done regularly, but it's always at the bottom of that never-ending list of things to do.
 

Shiftless

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Mar 9, 2014
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East Bay SFO
How long do water heaters usually last for you guys? Our municipal water is very high quality and my (natural gas) water heaters last about 15-20 years.
If you successfully repair your old one, how long before the tank leaks and ruins a floor?
Get ready to buy a new water heater and move on to another problem.
 
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kaymccampbell

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Feb 27, 2015
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Upstate New York
How long do water heaters usually last for you guys? Our municipal water is very high quality and my (natural gas) water heaters last about 15-20 years.
Get ready to buy a new water heater and move on to another problem.
15 years is about the screaming limit around here. We've got HARD water. Even with water softeners it eventually wreaks havoc on them.

Having said that, hot water makers that run off a boiler as another zone last for ages. Mine's 30-ish years old and the only bit that gave up was the aquastat. Mine is an Amtrol Boilermate.
 

PoorUB

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Mar 29, 2021
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11,854
Location
Fargo, ND
Pull the dip tube on the cold inlet. My bet is is broken off.

They do break off, then the water goes from the cold inlet right to the cold outlet. The bottom of the tank will be hot, but the cold water doesn't go to the bottom and push the hot water up.

As for the elements, check with a voltmeter and amp clamp. If there is voltage across the element wiring and no amp draw the element is shot. I would no be in a hurry to pull them. The bottem element might be buried in sediment and in that case time for a new heater.
 
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