BURLINGTON — Wolf Creek power plant has shut down because of a potential problem with an air conditioning unit that cools safety-related electrical equipment, a plant spokeswoman said.

Plant officials said they did not know when Kansas’ only nuclear power plant would resume operation. The plant, which is primarily owned by Kansas City Power & Light Co. and Westar Energy Inc., has been offline since late Wednesday.

“We did a lot of testing last night, and we are continuing to do testing today, including disassembling the air conditioning unit,” Cassie Bailey, Wolf Creek spokeswoman, said Friday afternoon. “By tomorrow, we should have a better idea of when we can anticipate going back online.”

The plant generates enough energy for about 800,000 homes, according to the Wolf Creek Nuclear Operating Corporation’s website.

KCP&L officials have reported the temporary shutdown would not cause a disruption in service.