Question about Rheem ELD80 480V Commercial Electric Water Heater

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I have Rheem eld 80 and have no hot water. Electrician checked if that was the problem but he said the bottem panel thermostat needs replaced and to call a plumber. Can most plumbers handle it. Is that hard to replace? I can't find a manual online. Where would I find the part? Any solution? Thanks Bob Carmack

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That cannot be fun whatsoever, I would definitely call the plumber to help you out. My guess is as good as yours that the plumber could probably handle it. I know I couldn't do this myself, so I would have to call a plumber to come to replace the part. This way the water heater will be repaired efficiently.

Posted on Sep 20, 2018

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Yes a local plumber should be able to do it. Finding the part however may be harder. There should be a plumbers supply company that handles commercial units nearby.

Posted on Nov 06, 2010


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1 Answer

Elctrical wiring of the thermostat Rheem hot water system


Yes, the reset probably is tripped...push in the red button hard
Then turn it on and try it...

Check out this tip..

How to replace the Thermostat and Element for
Electric Hot Water Heater


Feb 20, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

I have a rheem optima 315 single element. sometimes after a shower, the hot water cct breaker trips. unit did get low on water once when a pipe burst (am on tank water), and could hear water boiling, then...

It sounds like the element, which would generally be 4.8 KW for this size tank, may be faulty. Due to the incident mentioned it may have poor insulation resistance which causes a short circuit. I think you need to replace the element. If this is done by an electrician I would also get him to check the thermostat is okay.

Feb 14, 2011 | Rheem Water Heaters

1 Answer

Rheem 49 gal model 81V400B - hot water lasting only 5-10 minutes then takes an hour to heat back up.

Ordinary tank-type electric water heaters are fully repairable by homeowner.

A) Basic info on Rheem
Rheem electric water heater website:
Find age of Rheem: look 2nd and 3rd digit of serial number, for example 06 is 2006

B) Water heater has some hot water.
That says certain things: upper element is working, water heater electricity is working, reset button is not tripped, and heater is not experiencing run-away overheating event.

C) That leaves 4 suspects that cause lower amount of hot water.

1) TP valve is running hot water out of tank -or- leaking faucet is running hot water out of tank.
Check for leaks

2) Lower element is burned out.
Test lower element using inexpensive multi-meter from Home Depot.
Replace element with same wattage shown on label, and clean out sediment:

2) Upper or lower thermostat is bad.
Replace both thermostats for about $25.

3) Burned or shorted wire located between upper and lower sections of tank.
Turn off power. Open covers on side of tank. Remove insulation. Inspect parts for signs of high heat and burning. Especially check lower element. Tighten any loose wires. Replace part that shows signs of burning.
Put insulation and cover back over thermostats so cooler outside temperature doesn't cause thermostat to misread tank temperature.

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 03, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

No Hot Water

check power

check reset button - this is located on the upper thermostat - red button

if these are ok, then it most likely is your element. I would replace both at the same time instead of just the bad one. make sure they are both the same, usually 4500 watts, take them with you to the store to make sure you get the right parts

Sep 07, 2010 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Reset button keeps tripping, water gets too hot,new elements did not solve problem, can it be fixed or does the water heater need to be replaced?

replace the thermostats, be very careful!!!! thats 220volts for elec water heaters, 220volts kills you if you touch it wrong, is one thermostat but it's best to match them, so you'll need both,...not expensive. good luck, cracklin joe

Jan 07, 2010 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

The plumber put in the heater yesterday, the electrician says there is power going into it but no hot water today...It has not heated.

A couple of things....
Was the power turned on even for a couple of seconds before the heater was completely filled with water and the air purged from it? Powering up a hot water heater even for a few seconds with out the elements totally immersed will burn them out.
The other thing to check is the reset button on the top thermostat. It is posible that it needs to be reset.
Pull the cover and peelaway to insulation to find the red button. Push firmly on that and if it clicks it was the problem. If it continues to cut out then you have other issues. Be sure to cut the power before opening the cover to prevent getting shocked.
It is also possible that the top element is bad from the get go... If the top does not heat then it will never switch to the bottom and you will never have any hot water.

I hope that this will help you to solve your problem!

Thanks for using Fixya!!


Dec 08, 2009 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Our electric water heater doesn't work.

make sure it is wired correctly, check circuit breaker, check breaker built on to element. If all fails, and it is determined your not getting power to it, you may need a electrician. Be careful. good luck.

Oct 11, 2009 | Rheem 65 GAL ELEC Water Heater 6YR Self...

1 Answer

No hot water

You need to check that you still have 220 volts to element. Take reading . Sounds like you may need to change breaker out for new at breaker panel, look for 30-40-or 50 amp suggest qualified electrician only or you could have deathly results. Please Rate. Thanks

Mar 25, 2009 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

3 Answers

Rheem Hot Water Cylider Thermostat keeps tripping

Sounds like you have a faulty thermostat.  This is the unit that detects the water temperature, and if it is not where it is set, will kick the switch to allow electricity to flow to the elements you replaced. The thermostats are relatively cheap and if you have the knowledge to change the elements, changing these thermostats should not be a problem.

Mar 07, 2009 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

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