Worcester 24i RSF-L problem lighting?

[jackson105]

Hi, New on this forum hope you guys/gals can help, my boiler wont ignite on heating side, hotwater side no problem turn on tap heypresto boiler lights.
Turn heating on pump runs ok but no ignition, but if i turn hot water tap on boiler lights if i then turn water tap off the boiler stays lit? turn heating off then put it back on no ignition.
come on put your caps on and send some ideas my way.
Thanks in advance Mick.

 

[jackson105]

Hi, Has no one out there got a solution to my problem?.
Mick.

 

[Agile]

Thats a slightly difficult fault and if everything else has been checked could be the PCB.

But the CH sensor needs checking first as thats £14 and the PCB is about £140 !

Tony

 

[jackson105]

Hi, Thanks for reply is the central heating sensor the front one or the one at rear?, the one at rear has a resistance of around 1.9 ohms, the front one shwing open circuit.
Thanks Mick.

 

[Agile]

I expect the one at the back is really an overheat stat!

The one at the front might be a faulty heating sensor! That could be the cause of your problem.

But you need to look at the boiler manual to ensure that you are correctly identifying the problem.

As a trial you could place a 10k resistor across the leads to the presumed sensor and see if that makes it work ( on test only! ).

Tony