possible circulation problem ideal classic

[duff]

bit of advice pls, went to a ideal classic ff240 boiler fires for couple of mins then stops for a couple of mins then repeats cycled been like this for 4 months acording to customer ,replaced temp stat sensor as advised by ideal and boiler ran for 20 mins bfore starting to do it all again when disconected heating will stay on, system is gravity fed and i cant find a pump anywhere rads upstairs get hot down stairs luke warm at best at top cold at bottom, suggested flushing but dont want to look a tit if it still does it after.

 

[Mike Jackson]

The first thing you need to do is find the heating pump. It may have failed or be running slow.

 

[Brendan Rodgers]

As Mike says mate, you need to find the pump first as that dosnt sound like its doing much.. Have you checked the water condition?

 

[SimonJohns]

Alot of these boilers had the pump put above the boiler

 

[duff]

thanks everyone boiler is knee high in the garage cylinder is other side of house i can follow the pipes for a couple of meters from boiler through wall and up wall to the landing, as for the cylinder thers only a cyinder stat in airing cupboard looks like il have to start lifting floor boards.and laminate..