WASHINGTON – The Obama administration said Friday that it will expand its signature foreclosure-prevention program to try to help those with heavy debt loads avoid losing their homes.

The Home Affordable Modification Program will also be extended through 2013.

The government will triple the financial incentives for private lenders to reduce the principal amount of mortgages for homeowners at risk of losing their homes. And for the first time, the government will offer incentives for principal reductions to government-controlled mortgage giants Fannie Mae and Freddie Mac.

The 3-year-old program has strived to help those at risk of foreclosure lower their monthly payments. But it has failed to help more than half of those who have applied lower their payments on a permanent basis. Many have complained that the program is a bureaucratic nightmare.

The government has tried several approaches to help struggling homeowners.

In his State of the Union address Tuesday, President Barack Obama said many Americans have suffered steep losses because of the housing crisis. And while he didn’t address the criticism of his administration’s efforts, Obama suggested the government could do a better job.

His administration has promised to unveil new legislation in the coming days to allow more homeowners to refinance their mortgages under a separate program, the Home Affordable Refinance Program.