Question about Rheem 40 GAL ELEC TALL Water Heater 6YR SC 82VH402

1 Answer

Water is not hot, doesn't last long. Thermostats turn elements on when turned up. Elements show 230 when on.

Posted by blh1 on


1 Answer


Lower element can be burned out and still read 230V across screws

1) We know thermostats are working because elements test 230V.
2) We know upper element is working because tank has some hot water.
If upper element is burned out, tank will have no hot water.

3) Here's how to test lower element:

4)Here's how to replace element
Rheem element is 4500Watt bolt-in type

5) Rheem manual says: Heaters furnished with standard 240 volt AC, single phase non-simultaneous wiring, and 4500 watt upper and lower heating elements.

Water is not hot, doesn't - geno_3245_94.jpgRheem 4500Watt element

Posted on Nov 22, 2010

  • Anonymous Apr 29, 2011

    Photograph error: Rheem uses screw-in elements. Open panel on side of tank to identify type of element. Take photo of element to hardware store or home center to buy matching element. Element wattage and voltage printed on label on side of tank and printed on end of each element.



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Heater element only gets 120volts. Should be 240v, correct? Water does not heat up.

Testing voltage on heater can be tricky since elements can test 120Volt to ground all all times.
This is because thermostats only turn off 1 Hot leg in the 240Volt circuit, while the other hot leg remains live. Each hot leg in 240Volt circuit is 120Volt.
Troubleshoot electric water heater:
Try following things in order: Press reset button. Test elements. Replace thermostats.
Add comment.

If you need further help, I’m available over the phone at

Apr 29, 2013 | Water Heaters

1 Answer

How long does the model 81v52d last in years?

Did you clean sediment out of tank when replacing elements?
Did you replace thermostats? Thermostats go bad, or get out of calibration.
Copy following link for tank-type electric water heater troubleshoot:

Test elements.
Sounds like lower element is burned out.
Clean sediment out of tank. Check for water leak running hot water out of tank by putting ear against pipe.
Replace both thermostats.

Electric water heater will last 20+ years, IF ...
Electric water heater is totally unique because it can last forever with part replacement using parts from hardware store, as long as tank does not rust because of depleted anode rod, and pressure is kept below 80psi.
Annual water heater maintenance will pay you $10 a month, tax free money in pocket, by avoiding tank replacement.

If you need further help, I’m available over the phone at

Nov 25, 2012 | Water Heaters

1 Answer

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:

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.

If you need further help, I’m available over the phone at

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

1 Answer

No hot water at all but power to all elements and to thermostats is there a dip tube in the rheem model 71-40D

Water heater can test for 120V power on elements and thermostats at all times.
That's because thermostats turn off one leg of 240Volt circuit, and not both legs.
You mentioned thermostats and elements, implying two elements and two thermostats, so your water heater is 240Volt.
240Volt breaker might be bad on one leg.
Open following links to troubleshoot

Yes the water heater has a dip tube.

Jul 10, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

No hot water, checked ohms on both heat elements,top is 13.8 bottom is 13.4. i have 122volts to both elements and i played around with the heat adjustment on both top and bottom. over time could rusty well...

Marathon elements are specific to that water heater and can be ordered online, but generally are not at the local hardware.
Good to keep a couple spares around.
Marathon is 240Volt water heater.
Thermostats turn off one leg of the 240Volt circuit, so elements and themostats will always test for 120volts.
You removed wires off elements and tested each for continuity and tests showed elements to be good.
Test top two screws of upper thermostat and make sure you are getting 240V to the water heater.

If water heater has some hot water, then that says water heater is getting 240V, upper element is good, and remaining suspects are bad thermostats, bad lower element, or sediment build-up, or combination.

Open following link for troubleshoot run-down:

Water well.
If you have sediment build-up that reaches lower element, then water does not circulate around the element and water heater no longer heats very fast or accurately. If sediment is the problem, sooner or later the lower element will burn out.
Doesn't hurt to flush out the tank now and then, and vacuum out the sediment if that is problem.

Jul 10, 2011 | Rheem MR105245 Marathon Electric Water...

1 Answer


Not knowing how old the unit is, it's possible that both elements could be bad, especially if you ru out of hot water quickly. If your sure the breaker is okay and you know how to use a voltage meter. Check the voltage at the thermostats and elements. While you are looking at the thermostat(s), press the red reset button and give it about 5 minutes and see if you hear the water heating up. If you have voltage at the thermostats and the elements. Turn the power off and check for continuity through the elements. If you don not have continuity, the element is bad. If all seems to check out, you probably have a bad upper thermostat. Check all connections and inspect the wires.

Jul 06, 2011 | Rheem Water Heaters

1 Answer

No hot water at all

1. Check and see if the thermostats are getting power.
Remove cover (access Door) Test the leads for power
2. If there is power at the thermostats try hitting the reset button on the top thermostat
3 Check and see if there is power at the element
4. To tune up your water heater is an easy job ... You can buy thermostats for less than 15 bucks and elements cost 8 dollars at lowes or home depot. Remember to kill the power when working on the unit. It is 220V It will kill you !

Disco Power
Turn water off
Drain Tank
Remove wires to Elements ( Remember to match the amps on the elements !) If they are 3500 replace with 3500 etc.
take a wrench and remove elements and install new.
next replace the thermostats wire exactly as you see them

This project costs 30 dollars and makes your water heater new again !

Open the faucets in the house when they quite blowing air the tank is full !

Jan 14, 2011 | Rheem Water Heaters

1 Answer

Replace thermocouple

Here is a manual for your water heater, I think it's actually an 82VH40-2

An electric water doesn not have a "thermocouple" like a gas water heater does that senses pilot., Most electric hot water heater has two heating elements, two thermostats, with high temp cut outs. If your heater is not working, the elements could be bad. If you want to test, remove power to the water heater, disconnect wires from heater elements, and using an ohm meter measure resistance across the terminals. If it is open then the element is bad. You can compare readings from top and bottom elements. While the bottom element is on more often, if you're replacing one, I'd replace both. The water heater will have to be completely drained in order to do this. If the elements are ok, then you can test the thermostats the same way. It would have been better if you could have described your problem

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

1 Answer

New Rheem electric 50 gallon not heating

Check the elements, if you have access to a meter to check them. If they are getting power to elements and you have no hot water.
The elements are not working correctly. I had some elements check out ok till the thermostat's turned on and the elements didn't heat.
Sounds like the elements are bad.

Jun 01, 2010 | Water Heaters

1 Answer

Electric hot water heater not heating

If this all of sudden happened and you had hot water. Check for power to the heater and to thermostat. Thermostat may have tripped out to reset it just press red reset button on it.

If you have done all this and you have power to heater, thermostats and to the elements. Then the elements need to be replaced and you need to turn off power and drain heater before changing elements out.

I hope this will be some help to you.

Jun 01, 2010 | Rheem Water Heaters

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