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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8768
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Stiebel Eltron Tepra 36. It does not deliver hot

Customer Question

I have a Stiebel Eltron Tepra 36. It does not deliver hot water, if at all, until at least 5 minutes have passed. The red light on the first unit ( from left to right) does not go on at all. What is wrong? Please advise what can be done to fix it. Also , is there a qualified repair person in or near Escondido, California ?
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.


There is a printed circuit card inside the unit, I will point it out below, use a hair drier to warm it up to 120F or 130F but not over 140F. if you get any change in performance the printed circuit board is bad,

You will need a clamp around amp meter or a multi meter at least do diagnose the heating element cylinders. There is no specialist on those water heaters in the Escondito area that I can find.

It is not a common water heater.

Let me know how that test turns out, we can go from there without a time limit.