"The family thought it odd behaviour as they hadn't called Sky about any fault and the man didn't have any identification with him, though he was wearing a Sky shirt and had a clipboard with him," Ms Meadows said.
Sky had no record of a workman being sent to the address and police believed the man may have been checking out the home as a potential burglary target.
"Offenders quite often use props to try and deflect cautious victims and by the way this man behaved, in coming into the house when he was told not to, makes both the homeowners and police suspect he was there for anything but installing pay for view television.
"To that end we want people in the area to be wary of any unsolicited tradesmen's visits."
Anyone with information about the mysterious technician or who has had similar experiences, should contact Ms Meadows on (07) 858 6200.