How does a boiler sense the condensate pipe is blocked?

[SJB060685]

how the boiler senses the condy is blocked water will rise back into the hex blocking the flue so the ap switch senses this which in turn turns the boiler off / fault

I'm with you, thanks. You would of course have the same fault should the flue become blocked

 

[sxdave]

Thanks to all for your replies.

 

[Brambles]

Don’t under any circumstances attempt to by pass the sensor.

To avoid such intervention, most boiler control logic sequences will initially test the APS to be open before fan start up, only firing once the fan has started and subsequently proved the APS closed.

Never override or attempt to override a safety control sequence.

In my business it is a summary dismissal offence.

 

[SJB060685]

Don’t under any circumstances attempt to by pass the sensor.

To avoid such intervention, most boiler control logic sequences will initially test the APS to be open before fan start up, only firing once the fan has started and subsequently proved the APS closed.

Never override or attempt to override a safety control sequence.

In my business it is a summary dismissal offence.

Agreed Brambles. We had this conversation some time ago