How to mend Thelia 23

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the water pressure is below 1 bar ?

my boiler is saunier duval thelia 23 and the water pressure keeps going below 1 bar firstly is this dangerous... [Read more]

Saunier thelia 23 boiler not igniting?

I have a fault on the boiler, Everything seems to work but it will not ignite. I have checked the voltage to t... [Read more]

Saunier Duval Thelia 23 Code 64?

Hi Does anyone know what code 64 represents on the display of the Thelia 23 boiler, means I can start the b... [Read more]

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saunier duval thelia 23 boiler?

What is fault code 64

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Thelia 23 hot water problems?

Just moved into a property with a thelia 23 heater and I'm having problems getting the water hot enough for a ... [Read more]

How do i increase the water pressure in my thelia 23 bolier?

How do i increase the water pressure in my thelia 23 bolier

Thelia 23 e boiler - pilot light?

My pilot light won't light - plus pressue bar needs adjusting,

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How do I set the timer on my Saunier Duval 23 boiler?

I'm in rented accomodation with a Saunier Duval thelia 23 boiler. There are no instructions and while I can se... [Read more]

thelia 23 boiler problem hot water?

Concerning the thelia 23 boiler heating o/k but hot water only warm with control turned up to full. Could it b... [Read more]

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How can I fix the leak in Saunier Duval Thelia 23 boiler?

I have no pressure on the gauge and have a water leak, there is no hot water or heating and am desperate to ha... [Read more]

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how can i fix water pressure on thelia 23?

pressure is totally on the bottom but it is still heating but in the top rooms of the house the radiators are... [Read more]

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saunier duval thelia 23 when i use the boiler a screaming noise?

using the boiler there is a loud screaming noise the fan is on all the time and have to turn it off from the m... [Read more]

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Saunier Duval Thelia 23- no heating/hot water?

The problem seems to be the clock/programmer. With the slector switch set to 'auto' the display will normally... [Read more]

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Saunier Duval Thelia SB 23 - pilot won't light or stay lit?

The pilot will light with a match but there is no 'spark' and if lit with a match , the flame dies when the 'O... [Read 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 wa... [Read more]

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thelia 23, won't fire up (pilot lit, just won't heat water)?

When I try to turn the heating or hot water on, the fan keeps clicking between fast and slow, approx every sec... [Read more]

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saunier duval thelia 23?

new house - dead boiler. I have replaced the diverter valve & piece which it mounts to, now the micro switches... [Read more]

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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 fili... [Read more]

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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 lo... [Read more]

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thelia 23 boiler. No hot water upstairs when heating is on?

I have a Saunier Duval combi boiler, Thelia 23. Hot water works fine upstairs and down when the heating isn't... [Read more]