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Vaillant ecoTEC Plus - Flow Temp and Set Up

trebor12345 · 2026-10-09T10:39:13Z

Still setting up and testing my new Vaillant. Firstly I have attached some screen prints of my set-up, could you advise if my settings correct. I am trying to achieve: Internal Temp: 22CCurve: 0.2Manual setting24 hrs run time Secondly. My flow temperature is a lot higher than the target being set by the Heating Curve. Its 17C outside at the moment so I should see a flow temp of 25C according to the curve, but the app, sensocomfort, and my temperature probes are seeing 27C. Some addition data that may be relevant: Typical power 400 watts consumption, compressor running at 25%. HP is cycling every 2hours (which is to be expected).

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Air Source Heat Pumps (ASHPs)

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trebor12345

(@trebor12345)

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Topic starter 29/10/2026 8:56 am

Posted by: @jamespa

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Posted by: @trebor12345

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Setting a Desired Room Temperature on the sensoComfort Controller has NO effect? (You can set the Desired Room Temperature to 30C and it will have no effect on the flow temperature)

That is not the case. The heating curve adjustment sets the shape of the curve but the set desired temperature (if set to anything other than 20C) offsets the curve. This is explained on page 4 of the manual here

JamesPa

The chart explains well how the heat curve and manual temperature adjustment work together.

2024 build bungalow, Southern England, 179 m2, 12w/m2
Underfloor heating, fully open
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels
Tesla 13.5kw Powerwall 3

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