WASHINGTON -- WASHINGTON (AP) — It's not the sign the Obama administration wants people to see on its health overhaul website: Down for repairs.

Using overnight hours this weekend to debug the system, the Health and Human Service Department hopes to fix the technological problems that overwhelmed the launch of new health insurance markets. Glitches have frustrated millions of consumers unable to complete their applications.

Enrollment functions of the healthcare.gov site will be unavailable during off-peak hours this weekend, HHS said Friday. The department did not release a schedule for hours of operation, but a spokeswoman said the site would be taken down at 1 a.m. EDT each night for a few hours. The website will remain open for general information.

Credit card companies, banks and other online service providers regularly take down websites for repairs. That may also become a feature of the new insurance program.

An effort by congressional Republicans to defund or delay the health care law led to an impasse with Democrats over passing a budget bill, and that sparked a partial government shutdown Tuesday. Republicans quickly pointed to the website problems as another reason that the law they call "Obamacare" should be pulled back.

"Americans have seen once again that Obamacare is not ready for prime time," Rep. Eric Cantor of Virginia, the No. 2 House Republican, said in a statement Friday. "A dysfunctional website is the least of that law's problems."

The administration put the best face on the situation, noting the unexpectedly strong interest from millions of consumers.

"Americans are excited to look at their options for health coverage, with record demand in the first days of the marketplaces," said the release announcing the planned fixes.

The statement was headlined: "Health Insurance Marketplace Open for Business - Week One Success."

The state-level markets were designed to be the gateway to health insurance for people who don't have access to coverage on the job. Middle-class consumers will be able to buy government-subsidized private plans, while the poor and near-poor will be steered to Medicaid in states agreeing to expand the program.

Federal and state websites experienced problems this week. Some states, including Maryland, have also announced they are scheduling repairs.

The federal site, which serves 36 states, drew millions of users, an indication of strong consumer interest. Yet many people were unable to get on the site. They encountered a screen that told them to wait, and they did, sometimes for hours. Refreshing the screen only sent them to the back of the line.

Quite a few got hung up trying to create security questions to protect their accounts. The drop-down menus providing the questions would not populate. As a result, consumers could not advance through the application process and learn if they were eligible for a tax credit to help pay premiums, much less pick a plan.

Some who did make it through were timed out because they took too long comparing plans.

At the end of the first day at most a handful of people had managed to successfully enroll through the federal site.

However, by Friday, enrollments seemed to be picking up — though not yet at desired levels. The administration is not releasing numbers.

"We are pleased that enrollment for health care coverage through the new marketplaces is picking up," the Blue Cross and Blue Shield Association said in a statement. "We expect enrollment to continue to increase."

The so-called Blues are major players in the individual insurance market, but some smaller insurers have yet to see any new customers.

By Monday, "there will be significant improvements in the online consumer experience," HHS said.

The upgrades include extra capacity for more users to get into the system, more technicians working round-the-clock to fix problems, and new pathways to get to the application faster. No details were given. Call centers are also getting more staff and HHS said wait times are now down to less than a minute.

The administration previously announced it is adding equipment to handle the high volume of users. Now it looks like software fixes are also needed.

Consumers have until Dec. 15 to enroll for coverage that starts Jan. 1.

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  • 1912

    Former President Theodore Roosevelt champions national health insurance as he unsuccessfully tries to ride his progressive Bull Moose Party back to the White House. (Photo by Topical Press Agency/Getty Images)

  • 1935

    President Franklin D. Roosevelt favors creating national health insurance amid the Great Depression but decides to push for Social Security first. (Photo by Keystone/Getty Images)

  • 1942

    Roosevelt establishes wage and price controls during World War II. Businesses can't attract workers with higher pay so they compete through added benefits, including health insurance, which grows into a workplace perk. (Photo by Hulton Archive/Getty Images)

  • 1945

    President Harry Truman calls on Congress to create a national insurance program for those who pay voluntary fees. The American Medical Association denounces the idea as "socialized medicine" and it goes nowhere. (Photo by Keystone/Getty Images)

  • 1960

    John F. Kennedy makes health care a major campaign issue but as president can't get a plan for the elderly through Congress. (Photo by Keystone/Getty Images)

  • 1965

    President Lyndon B. Johnson's legendary arm-twisting and a Congress dominated by his fellow Democrats lead to creation of two landmark government health programs: Medicare for the elderly and Medicaid for the poor. (AFP/AFP/Getty Images)

  • 1974

    President Richard Nixon wants to require employers to cover their workers and create federal subsidies to help everyone else buy private insurance. The Watergate scandal intervenes. (Photo by Keystone/Getty Images)

  • 1976

    President Jimmy Carter pushes a mandatory national health plan, but economic recession helps push it aside. (Photo by Central Press/Getty Images)

  • 1986

    President Ronald Reagan signs COBRA, a requirement that employers let former workers stay on the company health plan for 18 months after leaving a job, with workers bearing the cost. (MIKE SARGENT/AFP/Getty Images)

  • 1988

    Congress expands Medicare by adding a prescription drug benefit and catastrophic care coverage. It doesn't last long. Barraged by protests from older Americans upset about paying a tax to finance the additional coverage, Congress repeals the law the next year. (TIM SLOAN/AFP/Getty Images)

  • 1993

    President Bill Clinton puts first lady Hillary Rodham Clinton in charge of developing what becomes a 1,300-page plan for universal coverage. It requires businesses to cover their workers and mandates that everyone have health insurance. The plan meets Republican opposition, divides Democrats and comes under a firestorm of lobbying from businesses and the health care industry. It dies in the Senate. (PAUL J. RICHARDS/AFP/Getty Images)

  • 1997

    Clinton signs bipartisan legislation creating a state-federal program to provide coverage for millions of children in families of modest means whose incomes are too high to qualify for Medicaid. (JAMAL A. WILSON/AFP/Getty Images)

  • 2003

    President George W. Bush persuades Congress to add prescription drug coverage to Medicare in a major expansion of the program for older people. (STEPHEN JAFFE/AFP/Getty Images)

  • 2008

    Hillary Rodham Clinton promotes a sweeping health care plan in her bid for the Democratic presidential nomination. She loses to Obama, who has a less comprehensive plan. (PAUL RICHARDS/AFP/Getty Images)

  • 2009

    President Barack Obama and the Democratic-controlled Congress spend an intense year ironing out legislation to require most companies to cover their workers; mandate that everyone have coverage or pay a fine; require insurance companies to accept all comers, regardless of any pre-existing conditions; and assist people who can't afford insurance. (Alex Wong/Getty Images)

  • 2010

    With no Republican support, Congress passes the measure, designed to extend health care coverage to more than 30 million uninsured people. Republican opponents scorned the law as "Obamacare." (Mark Wilson/Getty Images)

  • 2012

    On a campaign tour in the Midwest, Obama himself embraces the term "Obamacare" and says the law shows "I do care." (BRENDAN SMIALOWSKI/AFP/Getty Images)