potterton prime f60

[Ian Edgerton]

Boiler will not start unless i stuck on air valve, have replaced air valve but still no good have check fan which works and all pipes help please

 

[twgas]

have you checked the restrictor in the air tube?

 

[Ian Edgerton]

I have check brass restictor in white tube it is not blocked

 

[namsag]

Well if its correct new APS and fitted on correct orientation and tubes are connected properly with no splits and no blockages all the way into fan , check thoroughly as even slightest bit of dirt or slit will stop them working..
And Fan running all the time and not short bursts then it would suggest fan not running fast enough to activate switch

 

[alan m 1974]

r u sure you connected new aps correctly,

 

[alan m 1974]

A can of air is the best way to make sure venturi and tubes are completley clear,as they are very finley set so if the right amount of pressure isnt there it wont fire

 

[Ian Edgerton]

if you disconnect air valve plug it directly to pipe on top of fan valve still does not switch, so is the fan not power full enough

 

[namsag]

It can still be blocked within the fan. had it where there was a bit of insulation that acted as a valve could blow one way but when fan blew other way it closed hole off. never assume always check.

 

[Agile]

Its difficult for a DIYer but I would be measuring the air pressure at each of the APS tubes, ideally differentially.

Tony