Vokera Linea combi

[shaman]

Hi am new here but thought would give it a try recently (1yr ago) had this boiler fitted and all fine but recently when I fill bath the hot water runs hot then cold then hot then cold if left to fill a bath the water is just above lukewarm with the setting on its highest any ideas??? ps this is happeninng when the rads are on not sure when they are off as its too cold at mo lol

 

[DP]

Is the complete system new or just the boiler. What is the temperature on the digital display when the boiler cuts out in HW mode. Check the temperature in CH mode. Ensure both controls are set at maximum. Locate Benchmark logbook for settings as well.

 

[shaman]

whole system new 1 yr ago temp set on digi readout at 63 and water temp control is at max cheers

 

[shaman]

further to above i just put boiler in hot water mode only with temp setting on highest turned hot bath tap on and watched boiler as soon as tap turned on boiler lit but when temp reached 43 on digi boiler shut off!!!! HELP!!!

 

[DP]

Hot water temperature of 43 would put inlet water at 8. That is unlikely.

I suspect the hot water heat exchanger is scaled up.

 

[shaman]

actual water temp seems hotter than 43 comes out hot enough just the damn tghing cuts off when reading hits 43 if it is scaled up (is that likely in 1yr +?? it is a hard water area tho!) what can i do about it v limited plumbing knowledge and skills more a mechanic than owt find that water tends to leak n stuff would a boiler service by somebody who knows what they are doing clear this prob up? cheeers