Boiler move

I have been trying to move the boiler to the annex over the last few days.  I have been working on it in the late evenings, when I can't do roof work.  So last night, I was trying to take it off the wall and it just wouldn't budge and it is only 40kgs!  Eventually I hoisted it from the rafters in the roof and jacked it from the kitchen counter below, after all this force it eventually broke free!!  It only hangs on a mounting bracket, so no idea why it took so much force.

Now it is sitting on the kitchen counter on its side waiting for the sun to set.