How to mend ... Boiler Dhw Hot Cold

how to find a fault?

my sister-in-law has a glow-worm 30c boiler the central heatings ok but when they turn on dhw tap the water i... [Read more]

ferroli optima 901 c/heating problem?

heating will not come on but hot water ok. pump runs. boiler fires up when stone cold for c/h eventually but w... [Read more]

new worcester 550I combi boler?

When the hot tap is opened fully the temp of the water increases until the boiler trips out .Worcester service... [Read more]

potterton performa 24 ?

my boiler keeps fireing up then going off within seconds when heating is on it does get radiators hot but same... [Read more]

how can i fix my boiler?

i have a vaillant turbomax 242e changed diverter valve but still not getting hot water .gasman told me dhw hea... [Read more]

How can I fix my Saunier Duval Semia Condens boiler?

The Central Heating (CH) side works perfectly but the Domestic Hot Water (DHW) has developed a problem, thus..... [Read more]

Ferroli Modena 102 luke warm hot water?

Any help have Modena 102 sometimes when 1st time calling CH the gas flame is very low if flame doesn't spread ... [Read more]

Powermax 155 mixer valve design?

I have a Powermax 155 boiler. It has a mixer valve supplying DHW. Mine allows hot water to descend into the co... [Read more]

halstead ace he 30 dhw problem?

Hi All, I wonder if there is someone out there who can help with a very strange fault on a Halstead Ace HE... [Read more]

diverter valve not operating?

Hi I am having a problem with my potterton performa 28i boiler. Central heating works fine. Dhw giving cold ... [Read more]

boiler keeps anticycling?

I have a Halstead Ace High combination boiler,the boiler keeps shutting on/off either in ch mode or dhw mode ... [Read more]

How can i fix my Ariston A23 Mffi E Combi boiler NO DHW URGENT?

No Dhw, runs cold after a few minutes when demanded either alone or with CH demand, the burner continues to ru... [Read more]

Ferroli 38 HC/Heat Exchanger?

DHW Run's hot and then goes cold? I have a Ferroli Opimax HE 38C 4 years old, When I turn ON DHW run's hot a... [Read more]

Ferroli Boiler, dhw hot then cold?

get hot water for about 2 to 3 minutes then the same time for cold water, then back to hot. Any ideas.

Domestic Hot Water has a low flow rate on Vaillant AquaPLUS?

We've had our AquaPLUS combi boiler with 15l Power Store since 2005. However today the Domestic Hot Water (DHW... [Read more]

Ferroli Boiler HE 38C/Heat exchanger?

DHW Run's hot and then goes cold? I have a Ferroli Opimax HE 38C 4 years old, When I turn ON DHW run's hot a... [Read more]

DHW Run's hot and then goes cold?

I have a Ferroli Opimax HE 38C 4 years old, When I turn ON DHW run's hot and then goes cold A03 come up, sen... [Read more]

no hot water?

my sime super 90 boiler recently had a new fan fitted which repaired the boiler problem , but now my hot water... [Read more]

Lock out problem with vaillant turbomax plus?

My turbomax plus 828e locks out under the following circumstances.1 If I draw hot water when the boiler is co... [Read more]

biasi 24s DHW?

i have a baisi 24s boiler heating works fine hot water runs hot and cold? any suggestios