In message , Keith Dunbar
writes
I have a very antique Randall 103 central heating timer, which decided not
to switch on this morning - so perhaps the time has come to improve on it.
Trouble is, I can find to way to remove it from the wall. I've managed to
unscrew the cover at the bottom where all the wires come in. Of course I
could just smash it - but as I may not be able to get a replacement yet I'd
rather not do that. Has anyone any knowledge of how these come apart?

Whack it upwards with the palm of your hand, it's being held in place by
the contacts

I probably have a couple of working 103s BTW if you do kill it

I think that the 105E is an electronic pin compatible replacement which
would save you messing with rewiring, you might find that they are
called Danfoss now


--
geoff