Saunier Duval Thelia 623 boiler / shower issue?

Saunier Duval Thelia 623 combi boiler The weathers nice at the mo so the cental heating has been off the last month or so. Since then I'd noticed that gradually the water in the shower was getting ... more

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Saunier Duval Codens F30 heat exchanger?

My Saunier Duval Codens F30 is always depressurising and also, when it works for sometime, it shows a fault code F26 (water circulation fault). When it works, the radiators are hot, but the tap water ... more

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Where to find?

i need heat exchanger for saunier duval thema f23e It can be second hand

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Is the drop in pressure on saunier duval boilers a common fault?

I have a saunier duval boiler. Model no.THEMA CONDENS F 30E. My boiler is less than 2years old and the pressure is regularly dropping, and we have to keep re pressuring the system. Surely this is a m ... more

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how can i relight my saunier duval F23e?

hi suddenly my boiler pilot light is off the power is working but it wont fire up and i dont know how to re light the pilot light Please help

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no central heating but hot water working fine?

hi i have a saunier duval 30 e combi boiler.my hot water is fine but my central heating isnt working .there is like a build up of pressure then it knocks the heating of this is about 15 seconds after ... more

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pressure variations on thermaclassic f30e combi?

i put pressure to 1.5 bar , turn on the heater , the pressure rises to 2. 5 bar and the safety valve lets by , , i have replaced the safety valve, when the boiler goes off , the pressure drops down ... more

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How can I fix the boiler?

My boiler fires up as normal, however I have intermittent hot water while using the shower or bath. The hot water is fine when using a tap. Any ideas? I'm not that comfortable with Combi Boilers so pl ... more

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saunier duval 620f?

I have a 620f boiler the fan stopped working, took it out clean it and replaced it. boiler now fires up but then cuts out any ideas please many thanks

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how do I adjust water pressure on saunier duval combitek f23e?

The pressure gauge on front of the unit is reading around 2.8, ussually around 1.5 , what do I do to reduce the pressure which is climbing slowly towards 3 ? if possible can you explain in simple deta ... more

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Saunier Duval Boiler - SD30e cutting out?

Hi, I have an SD30e combi boiler (exactly the same as a Glow-worm compact) and recently a diaphragm had to be replaced on the diverter valve, which is a common problem. The hot water wasn't workin ... more

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saunier duval Thelia 23e 12 yrs old?

Hot water runs for approx 15 sec's before running cold for about 5 sec's and then repeats hot and cold. When heating first fires up on morning, loud clicking is herd at set Temp for approx 10 sec's, ... more

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what is an F4 fault on my Saunier Duval boiler?

My Saanier Duval has a persistant F4 fault occuring and clears when I swith of the power for 20 seconds

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saunier duval isomax c/h and hot water working but not hot?

Saunier duval isomax, when i run the hot water it works fine for 5 minuits due to it having a storage tank inside when this is used up it starts to run cold when i look at the flame it is verry low it ... more

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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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Can this hot water heater get water hotter?

We have a Saunier Duval tank less hot water heater. I can not get the water hot. The plumber was of NO help, slowed water pressure so it would move slower through the line???? We are ready to repla ... more

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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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