Had Vaillant installed in June 2007 - full system flush on rads etc. Had new bathroom fitted month later with mixer shower & mixer sink tap. All worked perfectly for three months.
In September 2007 the inline cold water feed to the boiler was turned off at mains to refit an in line filter which was leaking. Since that time problems have occured with hot water supply. Central heating okay.
All hot water taps in house can run luke warm without warning. If the taps are runnning luke warm and bathroom shower is turned on (even if it is turned on and off quickly) all taps then run hot. Hot water will then continue without problem. Then problem can return when shower is used again (but not always!). Sometimes problem o*ccurs without using shower. If the taps run luke warm again the problem is always rectified by turning shower on and off.
When the hot water runs hot there is a slight difference in water pressure i.e. water pressure from taps is slightly stronger when running luke warm.
Is it a gremlin - no-one seems to have an answer!!
In September 2007 the inline cold water feed to the boiler was turned off at mains to refit an in line filter which was leaking. Since that time problems have occured with hot water supply. Central heating okay.
All hot water taps in house can run luke warm without warning. If the taps are runnning luke warm and bathroom shower is turned on (even if it is turned on and off quickly) all taps then run hot. Hot water will then continue without problem. Then problem can return when shower is used again (but not always!). Sometimes problem o*ccurs without using shower. If the taps run luke warm again the problem is always rectified by turning shower on and off.
When the hot water runs hot there is a slight difference in water pressure i.e. water pressure from taps is slightly stronger when running luke warm.
Is it a gremlin - no-one seems to have an answer!!