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Fix Fault Saunier Duval

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We have 299 questions about fixing 'saunier duval' in category Heating, Home Heating Systems

saunier duval 620f?

Can anyone help i've just changed the fan over on my boiler but now i can't get the pilot light to stay alight, any ideas.
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limited hot water?

Hi i have a saunier duval thema condens f30e, the problem is with the hot water it works for 10 seconds or so then runs cold, heatings fine. tried with heating off and still the same, boiler lights up ... more
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can you tell me how to fix water pressure?

can you tell me why i cant get my system repressurised as it is under 1 bar i have tried to open the valve to add water but nothing is comming through ??? the system is a saunier duval f24e
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Saunier Duval Thelia 623 boiler?

I have just noticed that there is very low pressure in my hot water taps. I have checked the boiler and the pressure guage is between 1-2 when i turn on the hot tap the boiler does not switch on. i tr ... more
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Water pressure disappering?

I top my boiler(Saunier duval SD620F) up every day to have found out it is leaking from the over flow pipe outside and would like to know what spare part i should be buying to rectify the problem.It w ... more
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how can i fix my saunier duval thelia 623 combi?

I only get hot water when the heating is on
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Domestic Hot Water is not hot enough on Saunier Duval F28 condersor boiler?

Saunier duval F28 Boiler - Water initially comes out really hot them goes cooler. Can anyone suggest what is wrong.
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how can i fix saunier duval themaclassic f24?

boiler pressure goes to high and comes out pressure relief valve
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S-Duval F30E boiler problem?

Saunier Duval F30E combi: HW is okay on its own. CH is okay on its own. But when CH is on and HW is turned on, after a few seconds boiler locks out with F9 displayed and red light flashing. Wat ... more
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How can I fix pilot light problem on Saunier Duval SD623?

I had the bolier and seem to be fine. Also added cleaner to the system which has been in about 7 days. Pilot light keeps going out and boler appears to be overheating. Plumber been back twice - cleane ... more
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Saunier Duval Thema F 23 E hot water not working?

Saunier Duval Thema F 23 E needs attention because the hot water is not hot. It was suggested that it needs descaling is this likely and if so how do I do it?
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my saunier duval 30e system wont heat the radiators?

the boiler was left switched off while the property has been vacant, i have new tenants moving in and have tried the boiler, the pressure has been re-set and the hot water works, but the indicator lig ... more
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How do I pump up the expansion unit with air:Sauvier Duval Combitek F23E?

When I use my CH and set the pressure to 1 bar it rises to just above 2.5 bar and nears the red. There is also some leaking from the boiler itself causing the boiler pressure to reduce slightly over t ... more
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When heat in thermostate put two on , heating comes on for a while?

When heat in thermostate put two on , heating comes on for a while and when heatings on no hot water but pilot light is still on? Boiler is saunier duval sd 623 boiler
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Saunier Duval SD623: Flame goes off and on when boiler is on high setting?

For the past few months the boiler flame goes off and then on repeatedly when boiler is on high stting (when hot water is selected or high setting when heating is selected). Initially fan would also s ... more
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saunier duval 30e spares supplier needed?

I need a spare diaphragm for the space shuttle. Well, thats what you would think. Actually its the diaphragm for the DHW SENSOR only a small thing but who has them ????????????????
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Increasing water pressure?

How do I increase the water pressure in a Saunier Duval Thelia 23? I believe this is done by locating the filing loop, but I don't know where this is?
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boiler flame pulsate?

our boiler saunier duval, model No Thelia 23, when swathed on the flame pulsate, corgi reg engineer came to look at it and he thought it was air pressure switch and tape sealant around front cover, bu ... more
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leaking boiler saunier duval sd 623 14 years old?

i have a saunier duval boiler that is leaking inside it is leaking from some sort of housing at the bottom of the boiler is there any sealer i can put in the water 2 fix it
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What has stopped my combi boiler working suddenly?

My Saunier Duval combi boiler (sorry no model no.) has suddenly stopped working. Before, a green light would come on when the boiler was switched on - now the green light flashes constantly but there ... more
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Fix Fault - Heating, Home Heating Systems

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Fix Fault - Heating, Home Heating Systems

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