Don't expect the Obamacare website to function during "off-peak" hours over the weekend — Department of Health and Human Services officials will be taking it down then for maintenance.

"To make further improvements to the system, we will be taking down the application part of the website for scheduled maintenance during off-peak hours over the weekend," HHS spokeswoman Joanne Peters announced Friday in an email release.

"The enhancements we are making will enable more simultaneous users to successfully create an account and move through the application and plan shopping process," Peters said.

"During the scheduled maintenance, the call center will still be available to assist consumers throughout the night. We expect that Monday, less than a week after the Marketplace opening, there will be significant improvements in the online consumer experience," she said.

Peters' email was was titled "Obamacare Open for Business — Week One Success."

Peters said has received 8.6 million unique visitors. She did not say how many individuals had successfully enrolled in a plan through the website.