The city comptroller is accusing NYCHA management of withholding information about its heating systems for more than a year, leaving residents in the cold.

Comptroller Scott Stringer on Saturday threatened NYCHA with further court action after he says residents of some NYCHA complexes went without heat on the coldest Thanksgiving in the city in more than a century.

NYCHA buildings around the city are notorious for having heat outages for up to days at a time, especially on some of the coldest nights of the year. That's why Stringer says he opened an audit of the agency's heating system last year. But he says NYCHA management has been extremely difficult to work with, withholding information, denying access to boilers and lying about operations -- and Stringer alleges it's because they have something to hide. He said he's already served them with two subpoenas to hand over information and is prepared to keep going.

Stringer says NYCHA's lack of accountability and transparency is troubling. NYCHA residents who spoke with News 12 say they agree.

In response to a request for comment, NYCHA says its average heat outage restoration time for the last three days was 13 hours. They also said in a statement in part: "While it's been a challenging few days, outages have been fewer than last year, and restorations have been hours faster. We are working hard to deliver for our residents."

Stringer says he is prepared to go back to court to get more subpoenas for the agency and to use whatever legal means possible to get the information he needs to conduct the audit and hold NYCHA accountable.