we have vokera boiler and our heating system is working fine, but the hot water constantly runs hot then cold makes it difficult to have shower. so please what will be the cause of this hot water runs then goes cold

Tim, February 2011

I would like to ask STEVE B.G. what do you mean by calorifier, is this another name for Heat Exchanger? as i have a simular problem on my Vaillant Turbo max vuw242/1e . your explanation would be much appreciated. cotton bud.

cotton bud, February 2011

if hot water is going hot then cold repeatidly,most likely causes are either hot water sensor is faulty or calorifier is blocking with sludge but,be careful as you have to make sure your heating is actually working as it should because if the boiler is cutting out then starting repeatidly then you wont notice it on your heating cause it will still get hot,just takes longer than normal!!!

steve B.G., February 2011