Boiler flue blocked?

[Illuminate]

Am I right in thinking my ideal logic boiler flue is blocked? It looks like insulation or expanding foam?

Please enlighten me and so I know if it needs immediate attention or not.

Photo attached?

Thanks,

 

[ShaunCorbs]

Yes don’t turn the boiler on til it’s been sorted and safety checked

 

[Deleted member 120897]

Agree with @ShaunCorbs, zooming in the photo looks a little like an insulation pad used inside heat exchangers. DO NOT USE - I’d be classing as Unsafe to use.

 

[Illuminate89]

I can't thank you both enough, especially considering I have three young children. Fortunately I have an electric shower and friends who are gas engineers.

Thanks again