Burglars broke into a vacant house and stole a gas boiler in the Station Court area of Stoneyford recently.
Police in Lisburn are appealing for information about the theft which is believed to have taken place some time between Friday, February 21 and Tuesday, March 4.
They would like to hear from anyone who might have been in the Station Court area in the past two weeks and may have seen anything out of the ordinary to contact them at Lisburn Police Station on 0845 600 8000.
If anyone has information and would prefer to contact someone confidentially you can provide information without giving details to the Independent charity Crimestoppers.
They can be contacted on 0800 555 111.