Question about Rheem Water Heaters

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I just installed a marathon 50 gallon 4500 watt, hot water heater. I do not have hot water. The wiring to the upper element and thermostat all test at 240 volts. The lower element and thermostat show no voltage.

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  • Anonymous Mar 30, 2014

    Vanguard 50 gallon electric hot water heater Model #3WA73

  • Anonymous Mar 30, 2014

    Vanguard 50 gallon electric hot water heater Mode #3WA73

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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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I cant get the water temp below 125 and I need to for our day care. I have the lower thermostat set to 110 and it still is 125 to 130 degrees. Is there something else I need to do. There is a upper...


You have marathon water heater?
Thermostat is probably bad. Has gone out of calibration.
Replace both upper and lower thermostats for $25 from local hardware store, takes about 20 minutes, turn off power, take photo of wires before starting. These thermostats can be adjusted all the way down to 90 degrees, and then dial up a bit to reach 110.
Copy following link for instructions how to replace thermostat yourself.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

If problem continues, then replace both elements.
Elements are special order made specifically for marathon.
Requires 1-7/8" socket to remove elements.
Upper 3800 watt, order part SP610130
Lower 3800 watt, order part SP210197
http://hometips.me/Mar/Rheem-Marathon-parts-2.pdf
http://waterheatertimer.org/How-to-replace-water-heater-element.html

More information about Marathon:
http://waterheatertimer.org/Review-Rheem-Marathon-water-heater.html

Gene
h

Aug 26, 2013 | Rheem MR105245 Marathon Electric Water...

1 Answer

Can I install 4500 wt elements in a marathon MR50238? The tank specs are the same as MR 50245.


1) Product warranty will be voided if you install 4500 watt elements in year-2008 model MR50238 3800 watt marathon tank.
Older 3800 watt element models have been discontinued.

2) Copy following links for Marathon resources:
http://waterheatertimer.org/Review-Rheem-Marathon-water-heater.html
http://waterheatertimer.org/How-to-replace-water-heater-element.html

3) Product warranty is voided if element wattage exceeds label on side of unit.

4) Marathon has a problem with elements burning out frequently.
To solve this problem, they suggest installing element with lower wattage, such as the 3800 watt.
Upper 3800 SP610130
Lower 3800 SP210197

Feb 20, 2013 | Water Heaters

1 Answer

Brand new water heater is not heating up. checked the upper heat element and got 240 volts reading, the bottom one is not reading any voltage. Please help


1) If upper element is receiving 240V, then water heater should have some hot water.
If upper element is burned out, then tank will have no hot water, but element will still test for 240V
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

2) Keep in mind that upper element heats top part of tank first.
Only when top part of tank reaches thermostatic temperature will power be sent to lower thermostat and element. This is called non-simultaneous operation.
http://waterheatertimer.org/How-it-works.html

3) Non-simultaneous operation is necessary for most water heater installations because both elements are not ON at same time. Either upper element is ON or lower element is ON or both are off.
Each element is typically 4500 watts, which is 18.75 amps.
If both elements were ON at same time, it would consume 37.5 amps, so circuit breaker would have to be 40 or 50 amp with 8 or 6 gauge wire.

4) Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Mar 26, 2011 | Rheem 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...

1 Answer

The water won't get hot on model 81v52s 50 gallon. is there a rest or how to diagnose.


The reset button is located behind top panel on water heater.

If you have some hot water, then reset is not tripped, and tank has different problem.

I suggest a complete 30-minute troubleshoot using multi-meter from hardware or home center.
When test calls for checking voltage, rotate multimeter dial to 240-250-277 VAC
When test calls for continuity or testing elements, rotate multimeter dial to Ohms
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

Follow troubleshooting steps from top of page to bottom, and water heater if fully repairable by homeowner.
See label on side of tank for wattage of element.
Second two digits on Rheem serial number are year of manufacture.
Shown below are Rheem 4500 Watt element and Generic upper thermostat.

Add a comment if you need more free help.
Also take advantage of fixya phone service.
For a price, fixya expert walks you through repair steps over the phone.
geno_3245_207.jpg
geno_3245_206.jpg

Dec 31, 2010 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

I am only receiving half of the normal amount of hot water.


You have electric water heater.
Electric water heaters are fully repairable by homeowner, excluding hybrid type.

Rheem electric water heaters:
http://www.rheem.com/products/tank_water_heaters/electric_water_heaters/
Rheem fury series manuals and models
http://www.rheem.com/product.aspx?id=09DF2BDD-5E11-4D32-B574-84ACFB8A4619

Age of Rheem water heater is shown first 4 digits of serial number located on side of tank: for example 0705 means July 2005.
Serial number also shows model number & wattage of elements in case you need to buy new generic 4-bolt type 4500 Watt element from hardware store.

A) If your water heater receives very cold incoming water, it may not heat fast enough to keep tank warm.
Add a tempering tank.
http://waterheatertimer.org/Tempering-tank.html
Add insulation over entire water heater except TP valve. Insulate pipes completely.
Read more information:
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

B) 40 or 50 gallon water heater is 240Volts and tank will have 2 access panels on front.
Rheem ships all water heaters with 4500 Watt elements.

Narrow down the suspects:
C) Water heater has some hot water.
This tells us upper element is working.
And that water heater electricity is working.
And that reset button is not tripped.
And that heater is not experiencing run-away overheating event.

That gives us 3 solid suspects.
1) lower element is burned out. Test lower element using inexpensive multi-meter from Home Depot.
http://waterheatertimer.org/How-to-test-water-heater-element.html
Replace element with same wattage shown on label, and clean out sediment:
This will restore water heater to full 99% efficiency.
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

2) Upper or lower thermostat is bad. Replace both thermostats for about $25.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
If you want to test thermostats and all parts before replacing anything:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

3) Burned or shorted wire. Turn off power. Open covers on side of tank. Remove insulation. Inspect parts for signs of high heat and burning. Especially 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.

geno_3245_185.jpgRheem 4500 watt element

Dec 14, 2010 | Rheem Water Heaters

1 Answer

I awoke to no hot water, my heater is three yrs old and i just changed my upper and lower element and upper thermostat, still no hot water then i checked to see if i was getting power and i am, is there...


Your water heater has 2 elements so its 240Volts.

1) If breaker is delivering power on one leg of the 240Volt circuit, then water heater can appear to have electricity, but tank is receiving 120V. Both 120Volt legs are needed to complete the 240V circuit. Double check for 240Volts.

2) Review electric Load.
Water heater label shows wattage of tank.
If tank is 4500Watts for example, you installed 3500 or 4500 watt elements.
With 5500 Watt elements you need 30 amp breaker and orange-colored 10 gauge wire
With 4500 Watt elements you can get by on 20 amp breaker and 12 gauge wire up to 75 feet away.

3) Check ECO red reset button on upper thermostat. If reset is tripped, then ECO is reading high temperatures. Suspects at this point are defective upper thermostat, shorted wire or bad lower element.

4) Also note that insulation and cover must be re-installed over thermostat. Thermostat reads temperature through wall of tank. If outside air circulates around thermostat, that can cause a mis-read and cause tank to overheat and ECO trips.

If you don't want to test the heater, replace both thermostats for about $25. Return the upper thermostat for a refund. Then see of problem persists.

Here's what I would do.
1. Check breaker for 240
2. Check water heater for 240 across 1 and 3 screws on upper thermostat
3. Note wiring and breaker size.
4. Note label on side of tank.

5. Look at end of new element to see wattage printed on each element. Look for sings of high heat and burning. Tighten screws on elements.

6. Check ECO reset button. Look for high-heat and burning. Tighten screws on thermostat.

7. Test upper thermostat as follows:
http://waterheatertimer.org/images/Electric-diagram-water-800.jpg
Test left-side #1 screw to right-side middle #4 screw. Test should read 240V at all times. If not, then ECO is tripped, thermostat is bad, or electricity is OFF

8) Water heater is cold so upper element should be ON. Test upper thermostat.
Test right-side #3 screw to left-side bottom #2 screw and it should read 240V
Test right-side #3 screw to right-side bottom #4 screw and it should read 0 volts

8. If upper thermostat checks out. Test upper element for 240 across both screws. If upper element does not read 240 when water is cold, then element is bad or there is a shorted wire between element and upper thermostat.
How to test element:
http://waterheatertimer.org/How-to-test-water-heater-element.html

9. Do a full troubleshoot on electric water heater
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Dec 07, 2010 | General Electric GE SmartWater Household...

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

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


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.
http://waterheatertimer.org/How-it-works.html

3) Here's how to test lower element:
http://waterheatertimer.org/How-to-test-water-heater-element.html

4)Here's how to replace element
Rheem element is 4500Watt bolt-in type
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html

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

geno_3245_94.jpgRheem 4500Watt element

Nov 21, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

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