Climbing out of a window or going up a ladder? My experience of getting stuff serviced is that unless the situation is completely normal there's lots of teeth sucking and 'it's gonna cost ya' noises.
I have a lot of experience negotiating with lazy trades (and asking for non-standard complicated things tbf). Lucky in this case the installers will be servicing for five years.
Also from what I gather a HP service is mostly brushing the leaves out of the grill.
Climbing out of a window or going up a ladder? My experience of getting stuff serviced is that unless the situation is completely normal there's lots of teeth sucking and 'it's gonna cost ya' noises.