Does my Greenstar CDi have a problem with Siphon Fill Mode ?

[Mia Fenet]

Hello

My Greenstar CDi boiler goes into Siphon Fill mode multiple times a day for 15 minutes at a time - this means that there is a 15 min lag between the thermostat clicking on and the boiler leaving the siphon fill mode and kicking in and heat returning to the radiators.

Im looking for a steer on whether the boiler being in siphon fill mode so often is normal or an error ?

I have had an engineer in a couple of times - first time he changed the sensor in the boiler and now he wants to change the thermostat.

Thanks Mia

 

[ShaunCorbs]

I’m guessing it’s a heat only boiler ?

if I’m correct you haven’t got a permanent live at the boiler hence your problem (which it needs)

 

[Mia Fenet]

I’m guessing it’s a heat only boiler ?

if I’m correct you haven’t got a permanent live at the boiler hence your problem (which it needs)

Thanks - its heat & hot water but we dont use the hot water

So youre saying that every time it gets turned on it is initialising itself because it doesnt have the permament live ? Is this something I can check or do I get the engineer back to check ?

 

[ShaunCorbs]

On the boiler Front right hand side bottom should be a sticker what does it say ?

 

[Mia Fenet]

Only sticker on the outer casing is the one with the serial number etc is that the one you mean ?

 

[ShaunCorbs]

Should say something like

Worcester Greenstar 42cdi combi or heat only

eg

 

[Mia Fenet]

Should say something like

Worcester Greenstar 42cdi combi or heat only

eg

 

[Brambles]

Just ask the Engineer to switch off syphon fill mode from the programming codes.

if it has suddenly started to do it, there is an issue - if it has always done it, it is wired incorrectly.

in essence everytime the boiler is repowered it will go into syphon mode unless that mode is switched off.

It sounds as if your engineer is unfamiliar with these type of Worcester boilers.

 

[Mia Fenet]

ok - thanks a lot for your help

 

[ShaunCorbs]

Yep heat only needs a permanent live

 

[ShaunCorbs]

Just ask the Engineer to switch off syphon fill mode from the programming codes.

if it has suddenly started to do it, there is an issue - if it has always done it, it is wired incorrectly.

in essence everytime the boiler is repowered it will go into syphon mode unless that mode is switched off.

It sounds as if your engineer is unfamiliar with these type of Worcester boilers.

cant do that as if the trap is dry it can let poc out

 

[Brambles]

Look in the MI’s code 4f As long as the trap was filled after emptying / service it is sealed

 

[Mia Fenet]

Thank you for the replies - it was the permanent live that was missing - this has now been fixed - thanks !