Thanks mate. Took quite a bit of work and a few snapped but still go out in one piece enough to push back in later. 22 years of sitting there with probably the heat from the reverse cycle, dust, etc. and they really didn't want to budge. Not sure if it was the WD40, the heat gun [which I have to be ...

Much appreciated. Now around 20 years old and it doesn't matter how much I prod, push, curse, pray I can't get a bloody thing to move. Don't want to go up in to roof cavity [I am 80] so trying to get done from inside house. I even tried breaking them without going up in to the roof in a hope I could...

Hi Did you have any luck? I have exactly the same units, therefore same problem. I have looked at the clips from the inside of roof and can see they are not a type that can easily be removed. The clip is a slide type that slips down a one way ratchet slot. Any pressure just snaps off the plastic. Th...