Question about Stiebel Eltron DHC 6-2

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Is there a way to clean or replace the heating element on an eltron dhc 6-2. it appears that the element might be cover with calcium and doesn't heat the water.

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Yes, use vinegar. The best way is to shut off the water and electricity. Use a bucket with a quart or two of vinegar. Get an inexpensive submersible pump used for small water features or aquariums. Find the correct connections to be able to run from the pump to the "in" side of the heater, and then from the "out" (or hot) side run a nother hose that wil dump straight into the bucket. Turn on the pump and it will circulate the vinegar through the system and clean all the deposits. This should actually be done every 6 months or so, but the manufacturer doesnt tell you that because they want you to buy more water heaters. See if this fixes the problem, however, if it has gotten to this point, sometimes it shorts out the electrical and causes damage to the electronics. We will hope for the best but this is how to clean all the deposits out.

Posted on Mar 28, 2011

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Posted on Jan 02, 2017

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1 Answer

How do i fix my stiebel eltron tankless electric water heater?It stop working..


Th easy fix would be installing a new heating element that has burned out. You don't say what size this tankless heater but if it stopped working entirely you might have just one heating element inside. You can test it by (1) turning off the circuit serving the heater, disconnecting one of the wires to the heating element, then taking an ohmmeter to see what the resistance of the element is. If it is "infinity" then it is open and burned out. Replace element. If it is around 6 ohms (for a 10kW heater running at 240V) then the heating element is OK. Unfortunately those heating elements don't last forever. Check the repair manual on how to replace the heating element.

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Sounds like the heating element in the unit is shorting out. If you are handy you may be able to replace the part but I would recommend having someone look at it who is familiar with this unit.

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My tankless water heater is not very old, but I have to depress the relay to make it heat water. It will depress on its own sometimes, then other times not at all. How do I adjust this?


Hi,
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You need to run the sink on hot while you take a shower. This kind of cancels out the savings on electricity.
Or get a higher flow shower head. Your screen on the shower head may be partially fouled.
Here is the brochure. It shows the flow rates for the different models.
http://www.stiebel-eltron-usa.com/sites/default/files/pdf/brochure-dhc.pdf

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1 Answer

The water heater "Stiebel Eltron


I am a free answerer, and I specialize in giving you resources for free
The paid answerers may have a person who knows your product and the problems associated with your model.
I believe they offer a refund if the 'fix' doesn't work.
The manual might also have troubleshooting.

Each day I see 20-25 unanswered questions about tankless water heaters.
And the day before, there were same number of unanswered questions about tankless products.
The number of questions shows the complexity of the machines, the brand-specific-ness of the problems, and the inability of the manufactures to take care of their customers.
If I understand correctly, the manufacturer will refer you to the installer.
There are not many ways a do-it-yourself-er can fix a tankless.

http://www.thetankatwaterheaterrescue.com/forums/forum3/

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