trianco iona boiler shuts down after 15 mins

[lambrettakid]

I have a trianco iona boiler that fires up fine but after about 15mins shuts down. The red lock out light does not illuminate but the top two contacts as you look at the satronic tf830.3 controller are locked and need to be reset with the lockout button.
does this boiler have a temp sensor fitted anywhere?
I have replace the mz770 my next thought would be to replace the tf830 controller?
Any other suggestions please?
Thanks in advance
David

 

[lambrettakid]

Can anyone help or suggest anything please?

 

[oilhead]

Change solenoid coil on fuel pump. If you want to be sure, with a multimeter, check resistance through coil when cold, and again when it locks out.