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Hot water heater

No hot water good voltage changed thermostats an elements still nothing

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  • Rheem Master
  • 5,089 Answers

1) Check across top two screws on upper element for 240volts.
Circuit breaker can be tripped on one leg so water heater appears to have power, but only has 120Volts to ground, and not full 240Volt potential across both wires.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#electricity

2) Move wires to another same-size circuit breaker
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

3) Add comment and say what you find, and for more assistance Dec 2012

Posted on Dec 13, 2012

6 Suggested Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: no hot water

If the water does not heat, then you have to troubleshoot to find the problem. With a voltmeter determine if 240VAC is actually getting to the water heater. Take care here - a defective circuit breaker can give a false 240 volt reading - check for the 240 volts across the upper element (i.e. when the 240 volts has a live load on it, not just an open circuit test).
Also, remember, the upper element has priority over the lower element, and if the water is cold, the upper element will try to turn on and this locks out the lower element (only one element is allowed to heat at any given time). The lower element comes on ONLY after the upper thermostat is satisfied. Therefore if the upper heating element is burned out you will never get any hot water. If you suspect this, TURN OFF THE POWER TO THE HEATER and take a resistance check of the upper element.

Posted on Nov 17, 2008

  • 659 Answers

SOURCE: No hot water, Rheem Model RR612T, Electric Hot Water Heater, 60 g

If you don't have current, 0v from terminal to terminal, then you don't have voltage to the elements. Replace the thermostat but check that you have 220v to the thermostat. It is possible that your breakers to the unit are either bad or tripped.

Posted on Apr 07, 2009

  • 1 Answer

SOURCE: WE HAVE CHANGED THE THERMOSTATS BOTH OF THEM, WE

WE THOUGHT WE NEEDED ANOTHER THERMOSTAR, BUT WHEN WE WERE LOOKING FOR THE PART THE EMPLOYEE ASKED WHAT WAS THE TROUBLE. WE EXPLAINED, HE SAID YOU DEFINATLY DO NOT HAVE A PROBLEM WITH YOUR TANK AND ASKED IF WE HAD A SINGLE HANDLED FAUCET WITHIN THE HOUSE. NO WE DONT. HE SAID IT SOUNDS LIKE WATER IS MIXING WITH THE COLD WATER THATS THE REASON FOR THE WARM--COLD--WARM WATER. COME TO FIND OUT SINCE WE ARE REMODLING THE BATHROOM, WE HAD BOTH THE HOT AND COLD WATER TURNED ON IN THE SHOWER--BUT WERE PLUGGED OFF AT THE SHOWER HEAD AND THE FAUCET UNTIL THE TILE IS INSTALLED. SOOO ALL MY HUSBAND HAD TO DO WAS TURN OFF THE WATER IN THE SHOWER. NOW WE HAVE PLENTY OF HOT WATER, NO WARM COLD. YEA!!!

Posted on Jul 07, 2009

muttandjeff
  • 359 Answers

SOURCE: my rheem water heater does not stay hot for very

set top t-stat @140 and bottom @150 and see if that helps

Posted on Jan 06, 2010

  • 349 Answers

SOURCE: 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.

Posted on Jun 01, 2010

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

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1 Answer

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.
http://waterheatertimer.org/B220C.html#120-240
Troubleshoot electric water heater:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#reset
Try following things in order: Press reset button. Test elements. Replace thermostats.
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
Add comment.

Apr 29, 2013 | Water Heaters

1 Answer

No power to lower heating element


Test elements.
http://waterheatertimer.org/How-to-test-water-heater-element.html
If elements test out, then replace both thermostats.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

More resources:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
Otherwise, if you have some hot water, then power to unit is good and probably at least 80% rated voltage, breaker is good, and upper element is at least functional and probably working perfectly, reset button is not tripping so tank is not overheating.

Mar 27, 2013 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

No power to lower element


Hello Joseph

Test elements.
http://waterheatertimer.org/How-to-test-water-heater-element.html
If elements test out, then replace both thermostats.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

More resources:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
Otherwise, if you have some hot water, then power to unit is good and probably at least 80% rated voltage, breaker is good, and upper element is at least functional and probably working perfectly, reset button is not tripping so tank is not overheating.

Mar 27, 2013 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Can I run the hot water heater with a generator


Yes.
Ordinary electric water heater can run on any voltage from any direction (excluding volt/amp ratings below what can heat element coil).

Voltages include single-phase, split phase, and 3-phase residential/commercial voltages with either 50 or 60 Hz.
http://waterheatertimer.org/How-to-wire-water-heater-for-120-Volt.html
http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html#3-phase

Install line fuse.
30 amp fuse would be required to prevent wires from overheating, and eliminate fire hazard.

This information does NOT apply to energy-smart electric water heater with box on top of heater, or newer energy smart with electronics, or to hybrid water heaters, or heat pump water heaters with delicate electronic circuitry.

Why it works like this:
Ordinary electric water heater thermostats are mechanical bi-metal switches and respond to tank temperature, and are not operated by electricity.
Ordinary generic elecrtic water heater thermostats switch electricity on-off using mechanical bi-metal switch.
Heat elements are simple coil of thermal wire that gets hot when voltage is applied.
The element will get hot when power is applied.

Oct 29, 2012 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

2 Answers

LOWER ELEMENT IS NOT GETTING ANY VOLTAGE ON MODEL 65220RS


Short answer: Thermostats may be bad. Replace both thermostats.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

Long answer:
1) If water heater has some hot water, then upper element is good and water heater has 240Volts, and best suspect is burned out lower element.
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html

2) If water heater has no hot water because 240volt circuit breaker is tripped on one leg, and only 120Volts is arriving at water heater, then upper part of water heater can appear to have voltage and lower part of water heater can appear to have no voltage.
Open following links for troubleshoot steps:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/Test-electricity-to-water-heater.html

Add a comment for more help

Jun 14, 2011 | RELIANCE ELECTRIC WATER HEATER

1 Answer

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...


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.

Mar 20, 2011 | Rheem Water Heaters

1 Answer

We had no hot water so we check the elements with a voltage meter and found the bottom element to be bad. We replaced it. Now there is still no hot water. When we test the voltage again there is continuity...


The elements never run at the same time, it would take to much energy for a standard residential heater. Instead, they rotate powering up back and forth depending on the hot water demand. If you getting 208 to 240 volts on the top element and nothing is happening, the top element is bad and needs to be replaced. If you can swing 30 bucks, replace both elements and both thermostats at the same time. This way you know that everything is new. Check out this generic water-heater wiring schematic.

Sep 06, 2010 | Reliance & 50gal Electric Water Heater

1 Answer

No hot water, Rheem Model RR612T, Electric Hot Water Heater, 60 g


If you don't have current, 0v from terminal to terminal, then you don't have voltage to the elements. Replace the thermostat but check that you have 220v to the thermostat. It is possible that your breakers to the unit are either bad or tripped.

Apr 07, 2009 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Hot water heater


Absolutely no hot water indicates the top element or thermostat on the heater. Check to make sure that you have 240 volts on the top two terminals of the top thermostat. If you do then check the top element for voltage. It should also read 240 volts between the two screws. If you have 240 volts there shut off the power, drain the heater to a point below the top element and change the top element. When the element is installed turn your WATER back on and let the air bleed out of several hot faucets in the house. When the faucets stop spitting air you can turn them off. Check for leaks around the element. If you have no leaks turn the power back on the the heater and replace the covers.

That should get you 'back in hot water' in two hours.

Mike

Apr 05, 2009 | Element Chromalox SG1353-430326 Electric...

1 Answer

I need to know exactly how to hook the wires up to the elements


Have you checked that you have the proper voltage to the unit? You can do an ohms check and it should read 5 to 10 ohms on the elements. If this reading is good then the elements are good. Putting in new thermostats should have been sufficient. You need to start at he breaker box and start there checking voltages then work your way to the water heater. Somewhere you are not getting power to the unit. Both elements and both thermostats can't be bad at he same time. Too much of a coincidence.

Mar 22, 2009 | Whirlpool Water Heaters

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