The chairman of the state Senate’s New York City education committee warned Wednesday of a troubled start to the school year — and didn’t rule out a delay if ongoing issues aren’t solved in the coming weeks.

State Sen. John Liu told The Post that a lack of clear guidelines from City Hall is fueling uncertainty among parents and staffers.

“All the ingredients are there for another chaotic reopening — and possibly a delayed reopening — based on this administration’s track record,” he said. “There are still so many unanswered questions that don’t make me totally confident.”

Liu cited a raft of concerns ahead of the new term — including confusion over social distancing rules, the lack of a concrete plan for COVID-19-infected students, and stalled vaccination rates among school staffers.

“The mayor is trying to project certainty,” he said. “But unfortunately, people are not confident in the certainty he is trying to project. I hope there’s not going to be any delay. But everyone remembers what happened last year.”

The city principals union said last week that overcrowded schools would not be able to accommodate all students full-time if the DOE mandates social distancing.

Council of School Supervisors and Administrators chief Mark Cannizzaro said the DOE initially said the practice would only be carried out when possible before changing its position last week.

“It’s an untenable situation that the DOE is not giving more clarity on that,” Liu said. “You are putting principals between a rock and a hard place. You are going to have irate parents and dissatisfied teachers that they are going to be facing.”

Liu also pushed for some form of a remote learning option this year in light of the Delta variant threat.

“Remote learning can never replace in-person learning,” he said. “But if it looks like a significant portion of students can’t do in-person learning for whatever reason, then the DOE has to have a remote option as a backup.”

Division among teachers over vaccination mandates has also heightened tensions, with school slated to start in a matter of weeks.

According to the DOE, 60 percent of educators got the shot through official channels while others were vaccinated through private doctors or out of the city.

Some teacher groups have threatened to walk out of classrooms if unvaccinated staffers are allowed into schools.

Liu said he backed a vaccination mandate for all school personnel.

“Given the huge uncertainty and potential devastation of the Delta variant, the best thing would be to require the vaccine for school personnel,” he said. “They come into contact with a large number of people.”

Liu said he has been in contact with the mayor’s office, the DOE and union officials and hopes for a stable revival of the nation’s largest school system.

A DOE spokesperson said the agency was confident ahead of the opening bell.

“In May we announced our plan for a safe, full opening,” said spokesperson Danielle Filson. “New York City schools set the gold standard for health and safety and we can’t wait to welcome every student back on September 13.”