Some tenants of the Manhattan Promenade building where a man was crushed to death last week by a faulty elevator have started a rent strike as the remaining elevator also continues to malfunction, residents told The Post.

On Wednesday night, dozens of residents met at WeWork in Flatiron, with nearly 30 additional people conferencing in via telephone, to discuss the building’s safety, and their rights.

The residents are forming a tenants association on the advice of attorney Fred Seeman, who was at the meeting. He advised residents to begin withholding rent immediately.

“Your owner is a slumlord,” Seeman told the group. “How is this any different than an apartment building in the Bronx that doesn’t have heat? And what happens there? They go to jail.”

A city Department of Buildings official was also present, and assured tenants that the sole operating elevator in the lobby — the one that killed Sam Waisbren on Aug. 22 is still cordoned off — is safe to use.

He added that the commissioner had ordered that the management firm, ATA Enterprises, have an attendant on the elevator at all times.

“The attendant will be monitoring the elevator and keeping a log,” said the official. “Part of the job will also be counting heads to make sure it is not being overloaded, as it is the only working elevator in the building.”

Residents remain frightened, complaining that the working elevator has skipped floors and been shaky since the tragedy.

“A doorman even accompanied people last week because they were scared and during that journey, it got stuck on a floor and they had to go to another floor to get out,” said tenant Nick Anderer.

Eighth-floor resident Dayna Sargen said, “In under 24 hours after the incident, we were expected to take the right elevator, which was historically the elevator that causes the most problems. We were being told by the doorman and staff that, ‘It’s safe, it’s safe.’”

She refused to use the elevator, and after days of walking the stairs with two children and a double stroller, she said, “I physically cannot even walk right now. My knees hurt so much.”

For the time being, residents of 23-story Kips Bay building must call the lobby any time they want to use the elevator and they will be picked up by a staff member.

Residents said ATA has been virtually unresponsive, ignoring concerned calls and emails and even turning away one resident who showed up to the company’s midtown office.

“I can speak for pretty much everyone from that building that we are all appalled by the lack of communication and lack of humanity [ATA Enterprises] have shown in light of everything,” Anderer said.

ATA’s sent a two-sentence note to tenants more than 24 hours after 30-year-old Waisbren was killed, citing “an incident.” A follow-up email was sent four days later, stating it planned “to have all elevator mechanicals and electronics be replaced in their entirety.”

Calls to ATA were not returned.

“Everyone is really freaked out,” said one resident who asked to remain anonymous. “You never think, in a building where I am paying $2,800 for studio, that you could die from the elevator.”