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I have A water heater model sf-20-120 that I need to replace the heat element but I do not see a drain to get the water out of the tank. What do I do David

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Rheem Water heater model number 71-52D B 50 gallon is not heating water. Is the heating element something the homeowner can change themselves and how do I determine which heating element is bad


The bottom element is usually the first to go, without a amp clamp its hard to tell for sure.
To change it out turn off power and then the water, then drain the tank you will need to open the Pressure Temperature relieve valve, to release the vacuum as water is draining out, You will need a socket wrench to remove the element, Its 1 1/8 inch I think. The hardware store has one you can buy just for the element, if you water has minerals in it you will find debris in the bottom of the tank, you will have to get creative to get the tank clean, a shop vacuum and a pvc pipe small enough to get into the element hole and have fun.

Jul 04, 2011 | Air Conditioners

2 Answers

On our AE125, the thermal cut-off is tripping AFTER the water is turned off. The heating element is getting so hot you cannot touch it


The elements are getting over heated then set temperature.You have a defective thermostat. The elements will continue to heat until they reach the set point of the thermostat. Try to lower the temp setting first. If that does not fix it, you'll need to repalce the thermostat, located very near the element, under the screwed cover on the side of the tank.------------- To know how this heater works, read as follows:---

Because electric tankless water heaters have to instantaneously raise the temperature of incoming water to a selected hot water temperature, they require very powerful heating elements. To power the heating elements of this 27,000 Watt model, you will need to upgrade the electrical service you were using for your storage tank water heater. The PowerStar AE125 will require a 240V, 200 Amp service. In addition you will need to install three 40 amp dedicated double pole breakers in your electrical box. In Canada, you will require one 120 Amp breaker.

The PowerStar AE125 electric tankless water heater incorporates a very sensitive flow sensor, and three heating elements. The heat from the electric elements is electronically modulated on the basis of the flow rate of the water entering the water heater, and the temperature rise that the water heater must achieve. Through its electronic modulation system, the AE125 maintains a very precise hot water temperature. As a safety precaution, each of the three heating modules is protected by an electro-mechanical thermal cut-out. This device will cut power to a particular module if the temperature gets too hot.

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This will help.Thanks.Helpmech.

Jul 02, 2011 | Air Conditioners

1 Answer

I have a Atwwood modelGC6 9A-10E hot water heater. I can not get the electric part to heat... My guess is the element is burned out? How difficult is it to replace the element?


Yes, more than likely it is the heating element. Which should not be that difficult to replace, as it's just like a regular electric water heating element for residential water heaters, rather than ones made for the Motor Home or Travel Trailer industry. The only significant difference I can see, is it's a little shorter than those for home use.

Once the tank is drained, the element unscrews from the side of the tank. Of course, the circuit breaker to the water heater should be turned OFF, before starting any repairs. As should the water supply line feeding the heater. It's all pretty much a straight forward repair. Just be sure to take the old element with you when you go to purchase one. That way you can match up the proper size and amps that's needed. If you can find a stainless steel one, I would highly recommend it. It cost a bit more, but will last a lot longer.

Hope this helped to solve your problem. Please let me know.

Mar 07, 2011 | Air Conditioners

1 Answer

How do two thermostats in a water heater work?


If it's and electric hot water heater, there are 2- elements. One near the top of the tank and one near the bottom. This helps the water in the tank to heat evenly. On each element there is a thermostat. You have to remove the element covers on the side of tank to see them. Each thermostat, can be set up or down, but their settings should match. The normal, safe setting is 110 degrees. That will prevent accidental scalding.

Over time, the burner elements will fail to heat and will need to be replaced. It's not difficult to do, but you will need a water heater thermostat wrench to do it. They are inexpensive and can be purchased at any hardware store or home center. If you ever have to replace them (If one fails, replace both) I recommend stainless steel elements. They cost a little more, but will last longer. Particularly, if your water has a high mineral content (i.e Well Water).

To help lengthen their life span, it is recommended the the tank turned off (electric and water intake) and emptied and flushed at least one a year. It to, is an easy process, but takes about an hour to do, depending on your tank's capacity. To do this, all you need is a garden hose long enough to run outside or to a floor drain.

Hope this helps you understand how the Thermostats work.

Please let me know.

Feb 16, 2011 | Air Conditioners

1 Answer

I cannot get the water in the water heater to drain out


Are we talking about the big water heater for the whole house?-- the a 30 ro 40 gallon water heater-- one that stands several feet tall?

What heats it?-- Electric or Gas-- or what?

You have shut off the water supply to it?--

If electric:
AND THE ELECTRIC TO IT!!-- so you don't burn out the heater elements?

Can you find any drain plug near the bottom?
Some heaters have a valve at the bottom-- does yours?

Some Electric Water heaters make you remove the heating element to drain it--
You can remove the electric wires, and slip a big deep socket over the hex shoulders on the threaded type--- Or remove the bolts on the flanged type--
Which is yours?
And it helps to open a hot water faucet somewhere-- to let air into the tank, so water can run out the bottom.

If you are talking about an instantaneous water heater, it will mean opening some union fittings on the supply and return fitting of the heater-

Tell us more, so we can help more.

Mack B

Jan 18, 2011 | Air Conditioners

1 Answer

Bought reliance 602 50 gallon electric hot water heater 4 years ago and it stoped heating bought new upper and lower elements and new upper and lower thermostat and still no hot water power goes to all...


did you turn the breaker on ? before filling the tank ?the water tank must be completly full before turning on. the new elements will blow if not submerged in water ..if you have 240 volts at the element and its not heating one is out .only one element can be on at a time so you really need an amp prob to test element .try an ohm meter an check resistance ,sounds like one element is out .hope this helps good luck /P/Swhen filling tank. open a hot water valve, on tub or faucet to remove air while filling the tank. you will hear the air coming out of faucet. when water comes out its filled..

Aug 23, 2010 | Air Conditioners

1 Answer

How do i change the heating elemen in my Ruud water heater , model # PES40-2T


You'll need a heating element and a heating element wrench. Check your paperwork to make sure you get the right wattage.
1. Turn off the power 2. Drain the tank. 3. Remove the covers from the front panel. Should be one over each of the two elements. Once you've done this, check to make sure that the power is off. 4. Remove the two wires from the bad element. 5. Use the wrench to remove the element. It may be corroded, so take care not to strip out the hex nut. 6. After you remove the element, clean the threads on the tank up a bit with a wire brush. 7. Put a bit of teflon tape on the new element threads, but make sure that you don't have tape hanging out into the tank, and also that the tape doesn't interfere with the gasket on the element. 8. Install the new element. 9. Connect the wires and fill the tank. Check to make sure it doesn't leak before you turn it on. 10. Being careful to not touch the live wires, turn the unit on and allow it to heat up while checking for leaks. Once it's hot and not leaking, turn it back off and replace the covers.
That's it!

Mar 02, 2010 | Ruud Air Conditioners

1 Answer

I would like to replace the cathode rod from our electric water heater. It is a 6 year tank and was new in 2003. I have located the rod at the top of the heater. It has a hard foam cover covering the nut....


rip that foam off and get yourself either a gigantic socket or just get a water heater element removal tool. there are many sizes so make sure you get model number off the heater and check that out. are you sure you have a bad heating element? test it with an electric amp meter if it has power and draws no amps its probably bad. could be the thermostat which is much easier to change

Oct 08, 2009 | Air Conditioners

2 Answers

Water heater


With amp meter check amps on element wire . If no amps check Voltage and terminals on element. Should be 240 volts. Only one elements heats at a time. Top element heats up first then lower element heats up. Amps should be about 18 amps if working properly. One other problem could be a leak in hot water pipe or dip tube may be off. Dip tube carries cold water to bottom of heater so incoming and heated water are not mixed at top of tank

Jan 23, 2009 | Air Conditioners

3 Answers

We have a rheem electric hot water system which is suddenly not producing hot water. We have checked the electricity supply, the valve and both these were OK. We are at a loss to explain why this is...


Electric water heater are designed with two elements for heating the water. The upper element is what is called the quick recovery element which is control by a thermostat. The thermostat has a reset button that will open in an over temperature situation. If the reset is NOT tripped it is possible that the upper element or thermostat has failed. Until the upper element is satisfied ( up to set temperature) the lower element does not get any power through the circuit.

Jul 22, 2008 | Air Conditioners

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