How to mend ... B Dhw Out

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]

ariston class he 38 boiler fault?

I have a small water leak from the clip that holds in the DHW temperature sensor, have changed the O ring with... [Read more]

boiler will not fire up?

i have a biasi 24s boiler which stopped working last night, i had a leak from the dhw membrane housing which p... [Read more]

Biasi 24se, fires up, stops?

Biasi 24se, it fires up then locks after a short time. Push reset, then boiler does same thing. Have just ch... [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]

DHW running hot then cold?

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

Halstead Ace 30 - No DHW - CH on using DHW taps?

4 year old Halstead Ace 30. When turning the hot water taps on, 'H' shows on the display, swiftly followed by... [Read more]

hot water to ch when dhw turned on?

my Ravenheat RSF 100E combi is heating the radiators when the domestic hot water is turned on, is there a prob... [Read more]

Boiler set for DHW only,but CH also comes on Ferroli optima 1001?

The boiler is set for DHW only, recently even when hot water is not on demand , boiler switches itself on for ... [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]

What setting does the TMR need to be on a Vokera unica HE (under DHW knob?

On a Vokera Unica HE under the DHW what rang setting should the TMR be? (N Gas)

isar he30 boiler?

hi can anyone give me advice on my problem with this boiler .when drawing off dhw or running ch the boiler wil... [Read more]

how can i fix my ferolli domi compact 24b?

the hot water gets to 40 degrees goes cold then comes back on gets to 40 again then goes cold again, was think... [Read more]

Baxi 105E no domestic hot water?

have checked the micro switches and DHW pressure differential valve and seem to be working fine yet still no h... [Read more]

potterton prima f not firing up on CH?

My boiler will only fire up when on DHW and flatly refuses to fire up on CH. Any suggestions?

worcester bosch 280 heating rads while running hot water?

While running the hot water Ie.Shower, all the radiators are getting hot. Now I know that during DHW demand th... [Read more]

biasi 124mfs fault finding dhw ignition?

My old boiler is starting to play up. When running dhw the pump runs but ignition refuses to kick in. I then h... [Read more]

ravenheat csi85t combi boiler ?

when i turn the tap onthe boiler comes on then the ignition fires once the burner lights & instantly shuts dow... [Read more]

My boiler kicks in when hot water and heating set to off position?

My boiler ignites every half hour for roughly 30 seconds and then goes off, even when DHW and DTG are set to o... [Read more]

tap water luke warm?

my ravenheat boiler isnt working proper central heating is fine but shower and kitchen tap water doesnt get ho... [Read more]