360PJ - temperature problem

[Masey]

Hi All,

First time user looking for guidance.

I have a 360PJ Rayburn which will not get above simmer temperature.
Thought it may have been oven stat but even if I use it in heating priority mode and turn the room stat up to max it still won't get up to any temperature. Everything seems to be in order regarding igniting and running it just cuts in and out when up to simmer temperature.

Oil lines, filters, pump etc all cleaned out but no different.

HELP>>>>!