If it is your pump, then it will normally be in your airing cupboard... With a 10-16 boiler, the pump could be anywhere.... Trace your pipes from the boiler and that might help.
If it is your pump, then you'll obviously need to get a new one... But you may be able to "jump" start it by the screw on the front of it (If fitted).
GasAid.co.uk, December 2006