That"s what I would like to know , would it be better if I get the parts before they come then there is no excuse or wait and see, they know from the service history that they are not working, the last chap was really helpful re getting a new boiler and the best way to go about it but just can"t afford at the moment.
Or could he have been rubbing hs hands in expectation of receiving his introductory bonus?
I suspect they rarely look at the history before they visit anywhere!
If you get the parts then you will have to pay for them!
Wait and see what they say! Only then go into action if needed.
Tony