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Water is only warm

Used manual and reset upper thermostat 1 month ago, it solve problem. had to do it again this morning. do i replace element or thermostat or both. power miser 9 electric 4 years old

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  • Anonymous Jan 17, 2009

    The heater runs out of hot water fast.

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Most electric water heaters have two elements . One at the bottom and one at the top. Ajust the tempature the same on both. If you find yourself tweeting the thermostats , try flushing water through the tank and out the drain valve .on the bottom of the tank. This should be done annually .Since they usually  have two eliments, controlled by two thermostats. One may isolate(disconnect the electric leads, with the power turned off, and use an OHM meter to test then. They should both have the same reading. They are replacable.  

Posted on Jan 19, 2009

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My water gets cooler after a few minutes but if i turn the knob up the water gets warm again. I have replaced the elements and thermostats so what else could it be? I did see calcium in it when I replaced...


You replaced elements and thermostats on electric water heater.
You have some hot water and that says:
-Upper element is working
-240V circuit is OK and upper thermostat receiving 240 at terminals L1 L3
-Reset is not tripped, and tank is not overheating so elements are not shorted to ground
-Covers and insulation were re-installed and thermostat is not overheating tank from exposure to cool air.

That leaves following suspects:
1) Sediment build-up located in bottom of tank will interfere with lower element
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html
http://waterheatertimer.org/How-to-test-water-heater-element.html

2) Loose wire between upper and lower sections of tank
3) New thermostat is bad or wire connection at thermostat is loose.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

4) Upper thermostat wired incorrectly
http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html

5) Leaking faucet or TP valve running hot water out of tank, so tank cannot keep up.
Inspect TP outlet and other faucets.

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.

Feb 15, 2011 | Whirlpool Water Heaters

1 Answer

I have an electric Hot water heater with two elements. A few months ago we replaced the pop off valve and a year ago we replaced the thermostat.Since yesterday, we have not hot water. So my husband...


Replace the melted part.

If tank is popping breaker, then the melted part has a short circuit.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
When replacing thermostats, I usually replace both of them
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

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.

Jan 16, 2011 | Rheem Water Heaters

1 Answer

WATER IS LUK WARM AND NEVERS GETS ANY HOTTER. I HAVE REPLACED UPPER THERMOSTAT AND BOTH ELEMENTS


If you have some hot water on 2-element tank, that tells us specific information.
- You have 240Volt heater
- Electricity to heater is good, circuit breaker is good.
- Reset button is not tripped.
- You do not have overheating event, so access covers and insulation are in place.
- Upper element is working. If upper element is no good, then heater makes no hot water.

That leaves 3 suspects:
1) Upper or lower thermostat. I always replace both thermostats.
Take 30 minutes and do complete troubleshoot
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
2) Loose or broken wire between upper and lower areas of tank.
3) Lower element is bad.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on water heater or any do-it-yourself project.

Jan 11, 2011 | Reliance Water Heaters

2 Answers

Water was much hotter this morning, actually steaming when faucet turned to max. I checked thermostat & reset button, seemed to be normal. I shut off power and pushed reset button, waiting for it to...


I would try it again and if water temp is still to high then I would adjust thermostat down to say 120 degrees and see what that does.If problem continues I would replace thermostat. Thank you

Dec 20, 2010 | Reliance & 50gal Electric Water Heater

1 Answer

Replaced both lower and top elements and upper thermostat still no hot water. proper elec. going to unit.what could it be?


You need to take 1/2 hour to learn basics and then test water heater parts before replacing anything.
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html
Follow the troubleshooting steps, and it will tell you exactly where the problem is.
Otherwise we can guess at 20 different things.

Water heater is 240V because you have more than 1 element.
Did you test for 240V across top two screws of upper element?
Breaker can be tripped off on one leg and 120V arrives at water heater so heater looks like it has electricity, but circuit is not complete.

The problem can be loose wire, bad 240V circuit breaker, sediment reaching lower element, bad thermostat, bad upper element, tripped ECO reset button.

Did you replace factory insulation and cover over thermostats after replacing elements?
Did you vacuum out sediment when replacing lower element?

How long ago did you replace elements? If you turned power ON before tank was completely filled with water, then you burned out the element. If upper element is burned out, the tank has no hot water, even if lower element is good.
Test the upper element:
http://waterheatertimer.org/How-to-test-water-heater-element.html
See how a water heater works:
http://waterheatertimer.org/How-it-works.html

And finally, why so many folks write to fixya saying they replaced both elements and upper thermostat, but they never replace lower thermostat for another $6? I have been puzzled about that since lower thermostat turns on and off each time tank temperature drops and is responsible for keeping water warm during standby hours. Lower thermostat cycles more times than upper thermostat.

Add a comment if you need specific assistance with any of the testing steps.

Dec 14, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Circuit breaker in water heater will not reset.


If I understand correctly the red reset button or ECO located on upper thermostat will not reset.
Add a comment if problem is different.

Electric water heaters are fully repairable by homeowner.
If circuit breaker to water heater will not reset, then you need full troubleshoot using inexpensive multi-meter from Home Depot::
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

If reset button will not reset, then two things can cause this problem.
1) Ground short between upper thermostat and upper element, including shorted upper element.
a) Look at wires to see visible signs of high heat and burning.
b) Test upper element for short.
http://waterheatertimer.org/How-to-test-water-heater-element.html

2) Upper thermostat is bad. Test upper thermostat, or just replace thermostat using generic upper thermostat from hardware store.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

3) If problems persist:
Troubleshoot electric water heater using inexpensive multi-meter from Home Depot:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html


Upper thermostats are generic unless you have "energy-smart" water heater that has control box and reset button located on top of tank.
geno_3245_119.jpg

Nov 29, 2010 | RELIANCE ELECTRIC WATER HEATER

2 Answers

Rheem 83xr52-2 50 gal residential water heater. Water temp was low. I cut power at electric panel, removed upper panel on water heater, turned up thermostat, replaced panel and switched power back on at...


You can open the top up again. I would not turn the temp higher than 130 degrees, maximum. However, there should be above the thermostat a red button. This is where the power wires connect to the thermostats and heating elements. Sometimes this button needs to be reset, press it and discern if you hear a click sound. This means that the high temperature safety switch has tripped open and you had to manually "reset" it. There are two thermostats by the way. The water heater usually works this way. There are two thermostats and two heaters. The upper tank heater turns on first and it heats the top half of the tank. Then when the thermostat above is satisfied it then allows the bottom heater to come on and heat the bottom half of the tank. You might want to set the bottom heater thermostat as well. This is made this way because it is actually faster and more efficient to heat the top half first and the bottom half secondly. Try this first with the reset button. We could check voltages, but that requires a level of knowledge and safety that I am not sure that you are comfortable with. Pictures of the upper and lower thermostats and connections will help if the "reset" does not do the trick. By the way, not meaning or implying anything, but did you move the thermostat in the right direction? Sometimes the dials can be confusing.

Nov 28, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

My water is not heating in my Rheem 40 gallon electric. I pushed the reset button, but when I turn off the breaker and then on again, I do not hear the elements heating up.


Electric water heater can be repaired by homeowner
If I understand correctly, water heater is producing no hot water.
Reset button clicks in, but still no heat.

Three initial things can be causing this:
1) No power to water heater. Test across top two screws on upper thermostat for 240V. Red and black wire are attached to these screws. Screws are marked 1 and 3. Upper thermostat is same that has reset button. If power tests 120 across screws, then breaker may be off on one leg. If no power, then start testing at breaker.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

2) Upper thermostat is bad. Replace thermostat with generic upper thermostat available at hardware store.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

3) Upper element is bad. Test and replace element using Rheem 4500 watt element available at hardware store. Image shown below. Look at label on side of tank for element wattage. Rheem puts 4500 watt elements into all their 240V electric water heaters.
http://waterheatertimer.org/How-to-test-water-heater-element.html

If upper element is burned out the tank will not heat any water.
http://waterheatertimer.org/How-it-works.html

Rheem 4500Watt element
geno_3245_98.jpg

Upper thermostats are generic and interchangeable:
geno_3245_99.jpg

Nov 23, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Red reset button keeps kicking out, i reset button and works fine for a day or two then kicks out again


The reset button kicks out because the thermostat detects overheating.
Anything over 150 degrees, the reset kicks out.

This is caused by 4 things.
1) Bad upper or lower thermostat. Thermostat sticking in 'on' position and elements overheating water.
2) Factory-installed insulation and cover are removed
3) Bad element shorted to ground at center of element, and element continues heating with 120V through the ground wire.
4) Loose wire near upper thermostat, that is shorting and causing heat.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Solution:
Check for missing insulation.
Check for loose and burned wires.
Replace both upper and lower thermostat.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

If problems continue, test water heater elements and replace bad element.
http://waterheatertimer.org/How-to-test-water-heater-element.html

If you need more help, add a comment and I will respond.
e5788c4.jpg

Oct 29, 2010 | Reliance & 40 Gal Electric Mobile Home...

2 Answers

Whirlpool temp control on electric water tank


Most electric water heaters have 2 heaters - an upper and a lower, each with it's own thermostat. These are readily accessible by removing the screw covers on the side of the tank. Careful - the thermostats have 240VAC on the terminal screws (unless you have a small 120VAC heater) if the circuit breaker or fuses feeding the heater are still on - turn them off before proceeding. After removing the two screw covers and pulling back the insulation you will see temperature (screw) adjustments for the upper and lower thermostats, with a temperature indicating pointer attached to each screw. Set both thermostats to 125 degrees or so. Push the insulation back in place, replace the covers and turn the circuit breaker back on that feeds the water heater. You should have warm water within 15 minutes and hot water within a hour or so.

If the water still does not heat, then you have to troubleshoot to find the problem. With a voltmeter determine if 240VAC is actually getting to the water heater. Remember, the upper element has priority over the lower element, and if the water is cold, the upper element will try to turn on and this locks out the lower element (only one element is allowed to heat at any given time). The lower element comes on ONLY after the upper thermostat is satisfied. Therefore if the upper heating element is burned out you will never get any hot water. If you suspect this, TURN OFF THE POWER TO THE HEATER and take a resistance check of the upper element.

Nov 16, 2008 | Water Water Heaters

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