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We have 257 questions about mending 'water dhw boiler'

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Mend Heating, Home Heating Systems

anyone help with Baxi 105 HE problem?

Hello new to this site - hope someone can help with this problem. Baxi 105 HE - ch stopped working, in dhw mo... [Read more]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

Can anybody advise why Flexicom 35CX goes into state S53 when in DHW mode?

The boiler works fine for central heating and DHW for sink taps and shower, but when bath tap is used the boil... [Read more]
Mend Heating, Home Heating Systems

ravenheat csi85a ch problem ?

dhw working fine but boiler cycling when in ch mode.boiler will light and go out after about ten seconds and g... [Read more]
Mend Heating, Home Heating Systems

why ami losing pressure on my green star 28i junior boiler?

system and dhw working ok! check radiators for leaks and all topped up. The system is not dumping water ive ch... [Read more]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

Potterton heatmax combiboiler DHW problem?

At any flow rate the boiler only delivers water at 36deg C. Control on boiler indicates 60 degC and DHW set te... [Read more]
Mend Heating, Home Heating Systems

My halstead ace30 DHW not getting hot ?

The boiler fires up ok but the water I only Luke warm the CH is ok tried altering the control an resetting but... [Read more]
Mend Heating, Home Heating Systems

glowworm betacom 30 problem?

Hello folks, boiler is 2 years old, had plate heat exchanger cleaned/changed/cleaned...dhw sensor replace... [Read more]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

vokera combi hot water issue?

Hi My hot water tap has to be on full flow in order to trigger the boiler to fire up. Can it be adjusted to f... [Read more]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

halsted boiler problem?

i have a halsted ace he 30 combi boiler. when i turn on the hot water,the rads warm up,although i have only s... [Read more]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

Intermittent hot water on Baxi 105e?

Hi,my boiler has developed a fault on DHW supply,when asked for hot water, system fires up runs for 30 seconds... [Read more]
Mend Heating, Home Heating Systems

halstead ace high boiler problem?

after my son has spent 20mins or so in the shower,shortly after there is a hissing sound, and hot water comes ... [Read more]
Mend Heating, Home Heating Systems

Ravenheat CSI 120 can't control water temperature?

I noticed this morning that the radiators and DHW seemed VERY hot. When I went to adjust the temperatures usin... [Read more]
Mend D.I.Y, Plumbing

Hot water issue?

Halstead ace boiler c/h ok hot water intermitant. Changed diverter diaphram and dhw thermistor still issues. C... [Read more]
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