Can anyone help with a worcester greenstar 37cdi combi?

[Mill]

It works fine during the day but when it turns off at night, I.e no demand, in the morning it won't fire up. The roomstat is calling for heat ok and there are no fault codes coming up but the green pilot light isn't lit and the boiler doesn't fit up until I push the reset.

 

[Aquarius]

Sound like an issue with a sticking component. Hot water ok?

 

[Mill]

Sound like an issue with a sticking component. Hot water ok?

No. Its not great! Sometimes it's fine other times it either only gets lukewarm or nothing at all

 

[Brambles]

It is probably tripping out on overheat, possibly on first fire in the morning - are you sure the blue light is not flashing? - you need a decent engineer to check it over.

 

[EvilDrPorkChop]

It is probably tripping out on overheat, possibly on first fire in the morning - you need a decent engineer to check it over.

If it was tripping out it'd lock out though, the Blue light would be flashing and a Fault code on a CDI....

 

[Mill]

If it was tripping out it'd lock out though, the Blue light would be flashing and a Fault code on a CDI..

No the blue isn't flashing and there is no fault code showing.

 

[Brambles]

So when you say reset - what are you resetting? There is probably nothing wring with the boiler, possibly the external control system.

 

[Mill]

Thanks, I don't think it's the external controls at fault. If it was, why would reseting the boiler help?
Hot water is on constant on the boiler and has no external control.
I'm referring to the reset button on the top right of the control panel.