Question about Rheem MR105245 Marathon Electric Water Heater 105 Gal

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I have the 105 gallon electric hot water heater, the water temperature now isn't hot enough, what's wrong

The water is not hot enough-it was before-what's wrong

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 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.
Steve

Posted on Oct 11, 2009

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  • 3640 Answers

SOURCE: 40 GALLON WATER HEATER

the hot water tank may be filled with scale buildup on the inside. drain a few gallons out of tank until the water runs clear. it is best to drain out water heater at least 2 times a year.

Posted on Jan 12, 2010

motor1258
  • 6674 Answers

SOURCE: extreme hot water then to consistent luke warm

Possible thermostat problem. Are you experienced enough in that area to do some testing. Have a multimeter? If not experienced, don't try it, too dangerous. Call in a service person.

Posted on Mar 07, 2010

jeff_drakesr
  • 155 Answers

SOURCE: Rheem Electric 40 gallon water heater not providing heat

The elements may be burnt out you can check them by an electrical light tester. There is a lower and an upper element. If the tester lights up element is good. I hope this helps, please rate if the answer was helpful. Have a great day. Jeff

Posted on Apr 04, 2010

  • 23 Answers

SOURCE: I have a rheemglas standard electric 40 gallon

You should have two panels on the front of your water heater most likely painted blue. Each of these panels contains a heating element. The top panel contains the reset switch. Unscrew and remove the top panel and you'll see the reset switch - it is the red button. Press it to see if it clicks. If so, your hot water should last longer.

If it does not last longer than you stated, then you most likely have a bad heating element. The problem is that unless you remove both elements, you won't know which one is bad. If you don't feel comfortable turning off the water valve to the heater, turning off the power to your water heater at the circuit breaker box, draining the heater of it's water using a garden hose, removing the wires from the elements, removing the elements and installing new ones from your home improvement store then you may want to hire a plumber to do it.

The process is fairly easy but time consuming. The most time is draining the water heater. If you do choose to do it yourself, you will need to get a special "wrench" from your home improvement store to remove the heating elements first. The store can help you with the element(s) you need once you take them in.

Regards

Posted on Apr 05, 2011

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2 Answers

Water only stays hot for about 5 min or


Gas or electric?
Electric water heater ... then test for crossover, check for water leak, replace thermostats, test elements
Gas water heater ... test for crossover, check for water leak
http://waterheatertimer.org/Crossover.html

http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html


http://waterheatertimer.org/How-to-test-water-heater-element.html

water leak: turn off all taps and put ear against pipe and listen for water leak... check if water meter advances when all water taps are off.

Gene

Oct 09, 2014 | Water Heaters

1 Answer

What is the proper temperature setting for a hot water heater


The answer different if you have: concerns about diseases, a dishwasher, young children or elderly that can be easily burned, electric vs. gas heat, type of plumbing (e.g. PEX or Copper).

In 1988, the Consumer Product Safety Commission recommended that water heater manufacturers preset the maximum temperature at 120 degrees Fahrenheit to prevent burns. Since several states have mandated this maximum temperature.

Feb 08, 2014 | Amtrol ST-12-C THERM-X-TROL ASME Expansion...

1 Answer

Too much hot water, how to adjust water temperature


1) Copy following links:
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

2) if you have electric water heater, and too much hot water, then thermostat may be bad, or element is shorted and needs replacement. Test elements first, and if they're ok then replace both thermostats.

Jan 22, 2013 | Bradford White M240s6ds-1ncww 40 Gallon...

2 Answers

My family is moving in...how do i increase hot water availability?


large water heater, turn p the themo stat to a higher setting ( watch for burns with young childern and older folks)

or the best install a tempering valve. this valve mixs hot water with cold water before it goes into the building.

Again if you have young ones or old people they can burn faster than any other group.the best is a larger heater for the DIY person.

Thanks Tom

Sep 13, 2011 | Rheem Water Heaters

1 Answer

HOW LONG DOES IT TAKE AFTER INSTULATION TO HEAT WATER


Electric water heater typically makes 21 gallons hot water per hour.
Gas heater makes 41 gallons per hour.
If you use a timer on electric heater, it will make enough hot water for shower in about 15 minutes summertimer and 30 minutes wintertime. So incoming water temperature is a factor.

If your water heater is not full of water before turning on electricity, then elements will burn out.
Also the ECO might be tripped out: open top cover and push in red reset button.
How to troubleshoot electric water heater:
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

Apr 18, 2011 | RELIANCE ELECTRIC WATER HEATER

1 Answer

Water not hot enough


Hi,
Check out this tip about adjusting the water temperature on electric hot water heaters...

Electric Hot Water Heater Temperature Adjustment


heatman101

Oct 11, 2010 | RELIANCE ELECTRIC WATER HEATER

1 Answer

Energy smart hot water heater not giving ample amount of hot water both elements ohm at 12.5


element-connection-450.jpg
For images and product information
For manual


You checked ohms, did you check for 240V across lower element when lower element is turned on?

Energy smart electric water heater
has a control box on top of unit. Water heater does not have typical thermostats that can be tested and replaced. Temperature sensors located above each element send information to control box through small black and red wires. Temperature sensor sells for about $40, but there is no test listed that shows how to determine when sensors fail.

Potential problems:
-Temperature sensor is not reading correct temp
-Control box not processing correct temperature information
-Selector on control box set to 2, 3 or 4
-Thermostat temp on control box set lower than 120 degrees F
-Sediment build-up starting to surround lower element so water doesn't circulate (see if drain valve runs full-open

Oct 08, 2010 | Water Heaters

1 Answer

My Reliance 606 40 gallon water heater only heats up enough hot water to fill a bathtub. We've drained it, the pilot light is fine, it heats up the water really hot, but it just doesn't seem to be able to...


How big is your bathtub? Is your water heater set on the hottest setting? What is the temperature of the hot water at the tap?

Keep in mind that hot water can cause severe burns. Children and those with diminished mental capacity can be seriously harmed by hot water.

The "40 Gallon" rating on the water heater is usually the amount of hot water the unit can produce in one hour. So the tank, and the amount of immediately available hot water, might be smaller than 40 gallons.

My bathtub is 2 feet wide by 1 foot deep and 4 feet long. This is 8 cubic feet or almost 60 gallons. So a 40 gallons of water at 120 degrees, mixed with 20 gallons of cold water (60 degrees), fills the tub with 100 degree water. My January cold water is 42 degrees, so it will take 40 gallons at 129 degrees to fill the tub. If the tub is cold to start it will take even hotter water.

So the water heater might be just fine.

Possible solutions:
1. turn the temperature up on your water heater- or the temperature control could be malfunctioning and not getting the water hot enough.
2. insulate your hot water pipes so that the water loses less heat on the way to the tub.
3. bigger water heater.
4. smaller bathtub, or less full bathtub.


Jan 04, 2010 | RELIANCE ELECTRIC WATER HEATER

3 Answers

I purchased a whirlpool 40 gallon hot water heater model #BFG1J4040T3NOV in November of '08. since its been installed i been having a problem with the water staying hot for more than 1 shower. After about...


Will the water stay hot in the kitchen sink? Try to isolate the problem. If it is happening at all hot water locations, then it will be related to your water heater. If just in the shower then it is related to the mix of water ratio coming out of the shower hear. If its only the shower, then you are getting too much cold and not enough hot through the pipes. This can be very simple to fix by replacing the handle going to the shower. If this does not work then you may have a problem in the hot water pipes. After you isolate the problem, please post another question here.

Apr 16, 2009 | General Electric GE SmartWater Household...

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