Hi I have a Rover 75, 2 Litre and have been looking through the manual and it states that the central locking is controlled by the Body control unit ( BCU) which also holds a number of relays the BCU is situated behind the glove box, if there is a fault it will have to be checked with a diognostic tester,
the remote locking receiver is located under the central console up to 2001, or behind the instrument panel on later dates,why dont you go back to whoever fixed it and tell them its still not working correctly?.......Tom