Heatline vizo 24 lack of upstairs water temp

Joined
5 Jan 2010
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Location
Durham
Country
United Kingdom
hi i have a brand new heatline vizo 24 boiler in a new build property, boiler works spot on apart from water temperature for the bath is just warm no where near hot enough to enjoy a bath even though boiler is set to maximum hot water temp,
i have adjusted the potentiometer inside the boiler as described in the manual but still no hot water upstairs
downstairs water is hot as normal
anyone shed any light on this??
 
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Could be that the flow rate through the bath hot tap is too much, you need to measure it ( jug and stopwatch) to confirm. Would think that boiler specced to heat 10 litres/min of water by 35C roughly.
 
so if the flow rate is too high would i have to turn the tap down and see if this helps?
 
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Yes, but you would need to do measurements to confirm whether you have a fault or not.
 

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