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We have 310 questions about mending 'water boiler 20'

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Mend Heating, Home Heating Systems

How can I check if there is enough inhibitor in the water?

My boiler was changed last June together with some rads. Previously the volume of water was 13 gallons so inhi... [Read more]
Mend Heating, Home Heating Systems

How can I Fix My Ravenheat 820/20 boiler?

My ravenheat 820/20 boiler is supplying hot water but no CH. After a basic fault finding mission I discovered ... [Read more]
Mend Heating, Home Heating Systems

ravenheat 820/20 combi boiler ?

When I run the hot water tap, the water is cold, the pilot light doesn't start up, but when I put the central ... [Read more]
Mend Heating, Home Heating Systems

Boiler works but doesn't get CH to required temp?

My Alpha 240E boiler will produce hot water and some heat for central heating but it goes on for a bit then st... [Read more]
Mend Heating, Home Heating Systems

Why does the hot water on my Ravenheat boiler sometimes come out cool?

A Ravenheat 820/20 combi boiler, had diverter valve diaphragm replaced last year as it had perished, now occas... [Read more]
Mend Heating, Home Heating Systems

vaillant hot water problems?

got vaillant 828 turbo plus 3y old.hot water slow to cut in sometimes takes 20 mins sometimes 10 secs,have fit... [Read more]
Mend Heating, Home Heating Systems

vaillant woes?

hi all ,in need of a bit of help for a sick vaillant 828 turbo plus fitted about 3 years ago,a brief history... [Read more]
Mend Heating, Home Heating Systems

Trouble shooting guide required for Ravenheat 820/20 combi boiler?

Does anyone have a copy of this user manual/service guide/trouble shooter they could email me. My boiler is... [Read more]
Mend Heating, Home Heating Systems

Glow Worm Space Saver 50 Mk II - front cover warped?

Hi, BG changed my meter and cut off the gas supply. They couldn't relight the boiler and said it wasn't their... [Read more]
Mend Heating, Home Heating Systems

How do I change a Diaphragm on a 20/80 flowmatic VOKERA combi boiler?

Central heating working ok.Hot water starts to heat up but then runs tepid.So how do I change the Diaphragm.
Mend Heating, Home Heating Systems

How can i change the valve in my Vokera Excell 80SP combi-boiler?

I have a Vokera Excell 80SP combi-boiler in my house. We have it serviced every 6months and about the time we ... [Read more]
Mend Heating, Home Heating Systems

HOW CAN I FIX MY VAILLANT COMBI BOILER?

WHEN TURNING ON HOT WATER THE BOILER FIRES UP THEN AFTER 10-20 SECONDS THE BURNER GOES OUT AND THE RED BURNER ... [Read more]
Mend Heating, Home Heating Systems

Potterton Boiler?

Jack, Calling a qualified Corgi engineer to service the boiler and give me a certificate was the first thin... [Read more]
Mend Heating, Home Heating Systems

Ravenheat 820/20 Combi Boiler Hot Water?

Boiler is fine except when after running a hot bath. Pilot shuts off a minute or so later. Very hot water in ... [Read more]
Mend Heating, Home Heating Systems

How can I stop my boiler from tripping the RCD ?

Came home after successfully booking a stress free fortnight in Fuengirola to find the electricity was off in ... [Read more]
Mend Heating, Home Heating Systems

Ravenheat hot water problem?

Hi I have a ravenheat rsf 20/20 combi boiler, and we can only seem to get hot water out of it when the heating... [Read more]
Mend Heating, Home Heating Systems

Ravenheat 820/20 cut out?

My 820/20 runs at full pelt no matter hat the water flow. I have been told its not modulating ie not reducing ... [Read more]
Mend Heating, Home Heating Systems

potterton puma 80?

I run my central heating and the boiler ignites for about 20 seconds then stops. it will not run again for a l... [Read more]
Mend Heating, Home Heating Systems

problem with sime friendly format 80e?

boiler runs for about 15 to 20 mins o.k after it stops for a rest the boiler restarts for about 5seconds then ... [Read more]
Mend Heating, Home Heating Systems

Ravenheat 820/20?

When i turn my hot water tap on full the boiler fires up as normal but the water runs warm, when i reduce the ... [Read more]
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