Question about Rheem Water Heaters

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Hot water heater not heating

I have a 30 gallon tank i have replaced the upper an lower elements and thermostats an still have no hot water voltage is good what could be the problem

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  • Rheem Master
  • 5,245 Answers

Hello Nick. probably a simple problem:
1) Check across top two screws on upper element for 240volts.
Circuit breaker can be tripped on one leg so water heater appears to have power, but only has 120Volts to ground, and not full 240Volt potential across both wires.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#electricity

2) Move wires to another same-size circuit breaker
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

3) Add comment and say what you find, and for more assistance Dec 2012

Posted on Dec 13, 2012

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Posted on Jan 02, 2017

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  • 3 Answers

SOURCE: no hot water

If the water 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. Take care here - a defective circuit breaker can give a false 240 volt reading - check for the 240 volts across the upper element (i.e. when the 240 volts has a live load on it, not just an open circuit test).
Also, 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.

Posted on Nov 17, 2008

  • 659 Answers

SOURCE: not enough hot water

Makes you feel good to save some money right? Have a great day!

Posted on Apr 10, 2009

rick_stokes_
  • 61 Answers

SOURCE: warm water only

You can eliminate the shower control knob possibility by turning on your hot water anywhere else in the house. If you get hot water in other places, then it could be the knob causing it. A substantial lime buildup in the tank can also cause poor heat transfer from the elements to the water.

Posted on Sep 19, 2009

barterjoe
  • 344 Answers

SOURCE: My hot water heater tripped the circuit breaker on

Tough problem here. Most dual element heaters share one line. if this is the case and you have power on the top and none on the bottom I would check the connecting wires one to another. also check the settings of the thermostats. They may be adjusted all the way down. If the wires and connections are good I would recommend ohm testing the new elements. I have burned elements out by introducing cold water to very hot coils (forgetting to turn the water on after flipping the breaker)
Never forget that calcium buildup will short the element. If touching on the bottom you will burn it up.
If this does not help try borrowing hot water from neighbors ;)
Good luck
Joe

Posted on Feb 15, 2011

Testimonial: "top element = O ohms, burned out. Replaced top element, turned water on and waited for tank to fill this time "Prior" to plugging in. THANKS!! "

blackmar
  • 235 Answers

SOURCE: I just installed a marathon

The top element should be heating if there is 240 volts across the element terminals. I take it that the top element is the booster element. The thermostat for the top element is normally a 2 pole thermostat which switches the neutral to the bottom thermostat once it reaches temperature. Once this occurs then the bottom element will start to heat. The top element will only come on when you use all the hot water. Is this supply on the off-peak rate? When testing always check the voltage across the element terminals.

Posted on Mar 21, 2011

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Reliant 40 gallon tall electric water heater replaced both thermostats upper and lower elements flushed tank hot water very hot temp turned down lowest possible keeps tripping reset button what else could...


Problem has to be bad element or bad thermostat.

Test elements for short to ground through metal tank wall:
http://waterheatertimer.org/How-to-test-water-heater-element.html

Make sure factory-installed insulation and cover are re-installed over new thermostats so they do not misread tank temperature.
If problem does not show with elements, then replace thermostats again.

Oct 06, 2012 | Reliance & 40 Gal Electric Mobile Home...

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Got 5 minutes of hot water then cold. replaced both elements and thermos. still 5 minutes of hot water. power bill increased nearly 400% in 30 days. HELP!!! please.


When the top of the tank is hot the upper thermostat removes power from the upper heating element and transfers the power to the lower thermostat and heating element. If the lower thermostat is defective, then the lower portion of the tank will not be heated and the supply will be greatly reduced. You replaced both elements however check that the lower element is coming on after ther upper one cuts out and is acutally working.
Check for power at the upper thermostat terminals where the power is sent to the lower thermostat and heating element. If there is no power then the upper thermostat should be replaced. If there is power then check for power at the lower heating element. If there is no power at the lower heating element then replace the lower thermostat.
If there is power to the lower heating element then it should be getting hot. If it is not, maybe defective. Another possibility is a broken dip tube. Check for a broken dip tube and replace if necessary.

If the dip tube is broken, the incoming cold liquid can mix with the out going hot liquid and cause it to seem as though you are running out.

Nov 04, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

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LOWER ELEMENT IS NOT GETTING ANY VOLTAGE ON MODEL 65220RS


Short answer: Thermostats may be bad. Replace both thermostats.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

Long answer:
1) If water heater has some hot water, then upper element is good and water heater has 240Volts, and best suspect is burned out lower element.
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html

2) If water heater has no hot water because 240volt circuit breaker is tripped on one leg, and only 120Volts is arriving at water heater, then upper part of water heater can appear to have voltage and lower part of water heater can appear to have no voltage.
Open following links for troubleshoot steps:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/Test-electricity-to-water-heater.html

Add a comment for more help

Jun 14, 2011 | RELIANCE ELECTRIC WATER HEATER

1 Answer

I have an eighty gallon tank and can only get two quick showers out of it. I pull the relief valve open and got hot water. then i opened the drain valve at the bottom and got cold water. does this mean the...


Suspects are lower element -or- either upper or lower thermostat.
If water heater has some hot water, then upper element is good, and electricity and circuit breaker to water heater are good.
Dual element tank is 240Volts.

Good news is tank-type electric water heater is fully repairable by homeowner using generic parts from hardware or home center:
Links below explain water heater repairs with step-by-step photos
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-replace-element-and-clean-sediment-out-of-electric-water-heater.html
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/How-water-heater-thermostat-works.html

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 09, 2011 | Premier Water Heaters

1 Answer

Not getting enough hot water


You posted under Rheem 40 gallon tank-type electric water heater.

You have some hot water so that says specific things:
-Upper element is working.
-Electricity to water heater and circuit breaker are good
-You don't report a leak so TP valve is good
-You are not experiencing overheating event
-ECO reset button is not tripped
-Insulation and covers are in place so thermostat not exposed to cooler temperatures that would cause thermostat to misread temperature and cause overheating.

That leaves 6 suspects listed in order of difficulty:
1) Leaking faucet or broken water line that is running hot water all the time and tank cannot keep up.

2) Thermostats set too low. Turn power OFF, open covers and check each thermostat.
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

3) Loose screw, loose wire at upper thermostat, lower thermostat, or lower element. Turn power OFF and tighten screws, and look for signs of high heat and burning, especially on lower element.

4) Upper or lower thermostat. Replace both thermostats for $28 and see if that corrects problem.
Parts available at home center, hardware, or plumbing supply
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

5) Defective wire between upper and lower sections of tank: If this is the case, and water heater has 2" foam insulation, then tank usually replaced since insulation is too dense to drop another wire. Call for manufacturer for warranty information. Do a full troubleshoot using multimeter.
http://waterheatertimer.org/Water-heater-manufacturers.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

6) Lower element is burned out. Test lower element. Replace lower element. Rheem elements are 4500 Watts and are available at home center, hardware, or plumbing supply
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-replace-element-and-clean-sediment-out-of-electric-water-heater.html

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.

Jan 23, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

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

1 Answer

How do you set tempature to make the water stay hotter longer? I have a Rheem 82v66 2 (65 gal) and cant fill my bath tub with out running out of hot water.


65 gallon water heater should fill more than 1 bathtub since typical bath only uses 12-14 gallons hot water. First hour delivery on your tank should be greater than 60 gallons.
http://waterheatertimer.org/Hot-water-use-chart.html

Since you have such a small amount of hot water, it sounds like bottom element is burned out, or one of the thermostats is bad. There are two thermostats, and two 4500 Watt elements on 65 gallon tank.
If upper element was burned out, or water heater was not getting 240V electricity, then you would have NO hot water. So we know upper element is good and circuit is good.

Ordinary tank-type electric water heater is fully repairable by homeowner and parts are available at hardware or home center.
I suggest taking 30 minutes and doing troubleshoot before replacing any parts.
Buy cheap multimeter from home center.
When testing voltage, rotate multimeter dial to 240-250-277 VAC
When testing elements or continuity, rotate dial to Ohms.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add a comment for more free help. I can answer questions as you fix the water heater.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on heater.

Jan 11, 2011 | Rheem 65 GAL ELEC Water Heater 6YR Self...

2 Answers

I noticed my water wasn't staying hot long to shower and wash dishes. The water continually runs out of the relief valve to the outside of house. Had to shut-off water to unit and turn off breaker. What...


Sorry to read about your problem, I hope this helps you out.

most likely you have a defective relief valve, since you turned off a breaker, i will assume it is electric. water heater.

Their is a off chance, the the water heater is defective and getting to hot..but the thermal protection should kick in.

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question's. take the time to rate us.Thanks and good luck

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Jan 02, 2011 | Water Heaters

1 Answer

Only about five minutes of hot water, both elements and thermostats are good?


A] First of all, we know your upper element is working because you have some hot water:
http://waterheatertimer.org/How-it-works.html
It says tank is not overheating.
It says tank is getting 240Volts.
It we know water heater is 240Volts because you have 2 elements.
And it says reset button is not tripped.

B] That leaves 4 suspects:
Suspect 1) Bad Upper thermostat or Bad Lower thermostat: solution replace both thermostats for about 25$. Steps shown in link below.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
Suspect 2) Burned out Lower element: solution take out element, clean sediment out of tank, put in new element. Steps shown in link below
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html
Suspect 3) Loose wire or connection: solution open covers and remove insulation and look for signs of burning and high heat. Tighten all screws very tight. Replace burned part. Put insulation and covers back over thermostat so thermostat not exposed to cool air which will cause thermostat to misread tank temperature.

C] Before replacing anything, you can test water heater parts and determine exact cause of problem. Testing requires $5 multimeter from Lowes or Home Depot:
Install battery in multimeter.
When test calls for testing voltage, rotate multimeter dial to 240 or 250 or 277 Volts.
When test calls for testing continuity, rotate multimeter dial to ohms (upside down horseshoe symbol is ohms)
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html
After doing 30 minutes of testing, you will be expert in water heaters.

If sediment builds up inside tank, it will reach lower element and burn out the element.
That could be problem.
Restore full efficiency to tank by cleaning out sediment and replacing lower element.

E] More reading to preserve tank and save money long term
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Dec 10, 2010 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

We just recently replaced both heating elements in our water heater. Now the water is just barely getting warm and not hot. What's wrong??


Electric water heater if fully repairable by homeowner:

A] First of all, we know your upper element is working because you have some hot water:
http://waterheatertimer.org/How-it-works.html
That says tank is not overheating.
It says tank is getting 240Volts.
It we know water heater is 240Volts because you have 2 elements.
And it says reset button is not tripped.

B] That leaves 4 suspects:
Suspect 1) Bad Upper thermostat or Bad Lower thermostat: solution replace both thermostats for about 25$. Steps shown in link below.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
Suspect 2) Burned out Lower element: solution take out element, clean sediment out of tank, put in new element. Steps shown in link below
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html
Suspect 3) Loose wire or connection: solution open covers and remove insulation and look for signs of burning and high heat. Tighten all screws very tight. Replace burned part. Put insulation and covers back over thermostat so thermostat not exposed to cool air which will cause thermostat to misread tank temperature.

C] Before replacing anything, you can test water heater parts and determine exact cause of problem. Testing requires $5 multimeter from Lowes or Home Depot:
Install battery in multimeter.
When test calls for testing voltage, rotate multimeter dial to 240 or 250 or 277 Volts.
When test calls for testing continuity, rotate multimeter dial to ohms (upside down horseshoe symbol is ohms)
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html
After doing 30 minutes of testing, you will be expert in water heaters.

D] You replaced elements for a reason
.
Did you test elements before replacing?
Was tank producing some hot water before you replaced elements?
If tank producing some hot water, then lower element was bad, and upper element was good.

And when you replaced lower element, did you also clean sediment out of tank?

If sediment builds up inside tank, it will reach lower element and burn out the element.
That could have been original problem, and it could be same problem again.
Restore full efficiency to tank by cleaning out sediment and replacing lower element.
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

E} More reading to preserve tank and save money long term
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Dec 10, 2010 | Rheem Water Heaters

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