North Yorkshire Police is appealing for witnesses and information about the offence on Station Parade between 5pm on Monday, September 18 and 8am on Wednesday, September 20,
A spokesperson said: "It involved unknown offender(s) entering a secure site currently under demolition and removing five air conditioning units, nine radiators and a combi boiler.
"We are conducting enquiries and are requesting the public’s assistance to help determine the full circumstances surrounding the incident.
"In particular, we are appealing for information about a red pick-up truck that was seen acting suspiciously."
The truck was seen on Tuesday, September 19.
Anyone with information is asked to call 101. People can also email [email protected]
Quote the North Yorkshire Police reference number 12170168714.