Grant Euroflame Oil boiler

[Villagelife]

Hi i hope someone can help, a couple weeks ago boiler was not staying on so i thought i would check rads and i bled them and it fired up and was working for a couple of weeks. Now it fires up and cuts out after about 5 mins. I changed the 2 port valve as pretty much every year this fails. Still doing the same, ive checked the pump and it seems to be turning. Any ideas?? Really could do with some help.

 

[ShaunCorbs]

Pump sounds like overheating

 

[SJB060685]

Are you experiencing a burner lockout?

 

[Villagelife]

Pump sounds like overheating

Could be the pump but its free and the propeller moves...

 

[Villagelife]

Are you experiencing a burner lockout?

The boiler cuts out...not sure if the burner locks out

 

[SJB060685]

The boiler cuts out...not sure if the burner locks out

If the burner was locking out you would have to press the manual reset button on the control box every time to initiate a start/run sequence. You haven’t mentioned you doing that therefore the problem isn’t the burner. Could be on the controls elsewhere on the system or the pump as mentioned above.

 

[ShaunCorbs]

Could be the pump but its free and the propeller moves...

Might not have the force to move the water round

 

[SJB060685]

If the pump is struggling or failed altogether your boiler primary flow will feel very hot and I’d expect a large ΔT across the boiler.
Of course it might not be the pump. Perhaps there’s a problem on the controls side like I said, or maybe even a loose neutral somewhere.