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Old 14 Nov 21, 11:09 AM  
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FlorayG
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Originally Posted by SMAX View Post
Following is the explanation of Warm Start mode according to vaillant.

“ecoTEC combination boilers incorporate a warm start facility that keeps the domestic hot water heat exchanger hot, providing an instantaneous delivery of domestic hot water.” It is simply a pre-heat facility.

What this means is essentially the boiler is fired for the hot water secondary circuit so that the hot water reaches the taps much sooner than if this function was not enabled. You may hear the boiler fire up regularly throughout the day or night. If your taps are all located close to the boiler then very likely this function would not be needed and should be disabled.

myboiler/vaillant/vailla...t-mode-active/
Thank you I've just dug out the very complicated instructions leaflet and yes the per-warm was on. I've figured out how to switch it off let's see what happens
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