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New Rheem electric 50 gallon not heating

I just installed a new Rheem electric 50 gallon hot water heater. I am getting power (220) to the unit. The heating elements are getting power. I have waited over 2 hours with the thermostats set at 120. No hot water. I then changed the thermostats to about 140. Now 3 hrs and no change in temp. The old water heater had a secondary ground to the frame of mobile home. I did the same.

Posted by Anonymous on

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  • Anonymous Jun 01, 2010

    Hi ,, can you tell me how you wired the heater? how you tested for the voltage? where you tested the 220volts? and where on the elements you tested for the voltage .. Thanks ..

  • Anonymous Jun 01, 2010

    I wired using 10/2. From the 30 amp breaker I ran the wires to each of the wires in the junction box, one red the other black. The ground to the green screw. The old water heater had a secondary ground hooked to the frame of my mobile home. I replaced this with new. The manuel said I should run a secondary ground if I wasn't using conduit. I tested the voltage from the green ground screw to each of the load wires. 110 on each. I tested each wire individually on the elements with the green screw as a ground

  • Anonymous Jun 01, 2010

    I wish you had said that you tested your power between the two hots and confirmed that you have 220 volts. Yes I see you have two 110 tests .. but please test between the hots and confirm the 220volts. Your secondary ground is OK .. not usually necessary but a good safety , specially in a trailer. Do you have no hot water , or a limited hot water??

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Randy Marshall

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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.

Posted on Jun 01, 2010

Testimonial: "Thank you for the information. What if the elements are good?"

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2 Answers

I have water in the junction box on top of my hot water heater and into the electrical conduit leading to the hot water heater.
I do not see your earlier post with photo.

The problem could be the conduit.....
-disconnect the conduit and wires from water heater
-run wire into a junction box set lower than top of water heater... -then run another #10 wire from the junction box up to water heater...
-So if water is coming from conduit, it will accumulate into junction box and not in the water heater wiring cavity.

Next thing....
... a water softener can cause rusted tank.
-Softened water adversely affects anode rod...
-causing anode rod to deplete faster...
-once anode rod is gone, then tank begins to rust.
-Here are details for checking anode rod each 2-3 years:
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/How-to-maintain-water-heater.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Gene

Water Heater Timers Save Money

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Mar 05, 2015 | Rheem 82v52-2 Tall Electric Water Heater...

1 Answer

Brand new 40 gallon electric rhemm hot water heating not getting water hot
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#reset

http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#new

Gene
Water Heater Timers Save Money

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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1 Answer

Energy factor rating
Rheem 50 gallon Pro52-2 has EF .95, which makes it ordinary 240Volt 4500 watt non-simultaneous electric water heater that produces about 21 gallons hot water per hour, with 67 gallon first hour delivery.
Recommend 80 gallon per hour first hour for oversized bathtub.
http://bostonheatingsupply.com/Rheem/Rheem%20Residential%20Electric/Professional/Rheem_ResidentialElectric_Professional%20Spec%20Sheet.pdf

Maintain electric water heater and it will last indefinitely.
http://waterheatertimer.org/How-to-maintain-water-heater.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Anode rod is located on top in separate port.
Anode keeps tank from rusting.

Year of Rheem water heater manufacture shows 3rd and 4th digit of serial number.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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It could be element shorted to ground through steel tank, so don't touch tank when breaker is ON.
Or you have undersized 12 gauge wire and 20 amp breaker and the heat has loosened breaker on the busbar. Breaker trips when heat exceeds breaker limit. Jiggle breaker and listen for crackling sound.

To restore hot water now:
Turn off circuit breaker, and open top cover then Push in reset button on top of heater to restore functionality. Put back insulation and factory cover.
To fix water heater: test and replace bad element.
http://waterheatertimer.org/How-to-test-water-heater-element.html
If problems continue
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#trip-breaker
http://waterheatertimer.org/Troubleshoot-household-electricity.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sep 25, 2012 | Rheem 81V52D Water Heaters FOR 220 VOLTS

1 Answer

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Luke warm water is the result of top element bad and the bottom is the only one heater. The best solution I can reccomend is to change both out due to the fact the bottom element may go bad and since you have to change one you might as well change both.

Turn power and water off, drain heater down and once water is drained out change them out. Once new ones installed turn water on to fill heater and open faucets and get air out on the hot side of each faucet once water is flowing out of each faucet you are now ready to turn power back on.

Oct 12, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

I put a new top thermastate, bottom thermastate, new top element, bottom element, on my electric 50 gal tank and didn't get hot water. Only 4years old. Bought a new GE 50 gal. tank and installed, even a...
Hi,

The next thing you need to do is find out whether you have 240v to the bottom element....the top will not heat till the bottom is satisfied...
An electric meter is critical when working with these units....trace the power and see where it stops....

here also are some tips that will help you...

Electric Water Heater Wiring Diagram
Electric Water Heater not Working
heatman101

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1 Answer

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Sep 10, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

Rheem 21VP50-1. On hot water for 3 days. Shut of and turned on power...no ignition, no blower, no clicking.
Unplug the power supply for 10 minutes and plug it back in. If the standard start up does not occur, you have bad control valve or the Flammable Vapor Censer has trip the unit. In either case you need to contact Rheem for repair parts or a new heater.

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1 Answer

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We just installed a Rheem 50 gallon water heater. When you use any hot water a low pitched vibrations occurs that you can hear in the bathroom and bedroom. When the water heater completes the heating cycle...
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