No Hot Water

9Kw Mira Sport - Okay, so power light on, low flow light off. Started off hot and went cold for 10 secs then back to hot again. Did this for a week or so now constant cold from the start. Tried all setting etc to no avail. Measured voltage with prongs on each side of thermal switch and 244v. Another with one side of thermal switch (+) and the other on each one of the connectors on both micro switch and same voltage. I can't figure out which item is faulty. Any ideas?
Asked 10 years ago by Anonymous

If the showeris absolutely cold then I think you may have a faulty Thermal Cut Out

A faulty TCO will have no continuity across the two terminals (Theblack thing on top of the heating tank)

Therefore agood TCO will have power at both connections and a faulty TCO will have power atonly one.

(The function of the TCO is, if thewater over heats it cuts the power off to the elements)

SeeVideo.

http://www.youtube.com/user/showerdoc#p/u/2/_zi8JbEMYMs

If there is some heat it may be a faultyelement in the heating tank (there are two, three in most 10kw showers) you cancheck them with a multi meter you should have a reading of around 12>18 ohms.

If you have power to the elements and noheat it's probably the elements, no power to the elements then it'sprobably a micro switch.

Check your head, hose and inlet filter for blockages.

Answered 10 years ago by Anonymous

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