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My Megaflow Immersion Heater D70 suddenly stopped heating the water. I only use it for hot water, not heating. The fuse was fine but I switched on and off just in case with no result. It is getting on a bit at 6 years but wonder if there is anything I can do before I call in the plumbers. Also, if it is worthwhile getting parts for this tank or replace it.Live in hard water area so maybe element is gone. Can water softener be attached to the inflow of the tank to descale softening the water now or going forward?

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For this problem , if you have a multimeter and a modicum of knowledge you can (carefully!) check for voltage at the element yourself. multimeter may show the timer was at fault so tat u can replace it and make it run!!

Posted on Nov 09, 2008

  • AbdulRahiman S Nov 09, 2008

    Else You need to check there is power going to the immersion by removing cover and using a circuit tester. I f you have power, chances are the immersion the has had it. Go to your local DIY shop and buy a new one. They come in two sizes 7'' or 14''. To find out which one yours is you need to turn off power and remove the thermostat, the thing in the middle that moves. Undo screws holding wires in place, then you can remove it. Go to shop amid buy the thermostat fit it and see if it works. If it still doesn't you will need to remove the heating element with a special box spanner, after draining the tank, remember to turn off the supply to the hot water tank. Go to shop buy heating element and fit taking care to connect wires the way you removed them.

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Have you checked current flow to water heater element .

If the water is cold and there is no current, then you have a bad thermostat.

Posted on Nov 09, 2008

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That is probably a faulty heating element, test the heating element for continuity.

Posted on Nov 09, 2008

  • Ginko
    Ginko Nov 09, 2008

    If this does not heat at all, then removing the scale will not work.

    The problem is probably the heating element ( a resistance) , that after so many years of service had probably broken and must be replaced, that is within normal maintainance standards, considering the age of the heater.

    The elemt cost is usually below $10, and the labor is around $80, still worth to repair.


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