Burner and pilot go out together

[Pilfo]

Glow-worm Space-Saver 40B MK11. (Balanced Flue)

New thermocouple, thermocouple re-router, pilot burner, and gas valve fitted by myself 6 weeks ago. Boiler has been working perfectly until last week...it will fire up and then both the main burner and the pilot go out together, with the flame failure device operating.

 

[scatmanjohn]

thermocouple re-router

Whats a thermocouple re router (do you mean interupter).

How long does it run before it goes out.

 

[fitz1]

flamelift

 

[Pilfo]

thermocouple re-router

Whats a thermocouple re router (do you mean interupter).

How long does it run before it goes out.

Thermocouple connector lead.

When the thermostat is on its absolute lowest setting (just a midgers before minimum) it will continue running. Once the thermostat is increased ever so slightly the problem occurs, and it will only run for between 2-5 minutes.

 

[Pilfo]

flamelift

I have set the burner gas pressure (hot) to about 13 mbar (recommended range rating is 10 mbar min and 16.3 mbar max)

 

[sime10]

Injector, Pilot assembly

 

[Pilfo]

Injector, Pilot assembly

Renewed!

 

[fela kuti]

the overheat stat is operating to shut pilot off
the thermostat needs recalibrating this can be done with a small screw driver find the hole with + and - on the underside of the ranco stat.

 

[nickso]

you say its the flame failure device shutting the pilot off....how did you confirm its due to flame failure?.

were you just generalising and you mean its just cutting the pilot for an as yet unknown reason?

have you tested the temperature the boiler gets to before it cuts off?

 

[Pilfo]

the overheat stat is operating to shut pilot off
the thermostat needs recalibrating this can be done with a small screw driver find the hole with + and - on the underside of the ranco stat.

Sounds good!

I was about to buy another stat tomorrow.

How do I recalibrate it?

 

[Pilfo]

you say its the flame failure device shutting the pilot off....how did you confirm its due to flame failure?.

were you just generalising and you mean its just cutting the pilot for an as yet unknown reason?

have you tested the temperature the boiler gets to before it cuts off?

Yes, I am just assuming that the burner and pilot are cutting out for as yet, an unknown reason.
However the previous post sounds feasible.

 

[urbanspaceman]

boiler overheating-have you checked pump is running.....

 

[Pilfo]

boiler overheating-have you checked pump is running.....

Pump (Grundfos) is running OK, on MAX (No. 3)