If there is a big difference between the initial interest rate and the APR listed in the ad, it may mean that there are high fees associated with the loan.
Both new homebuyers and refinancers can get free access to the credit reports that lenders use by visiting AnnualCreditReport.com, a website created via Congressional mandate. A free report from each of the three consumer reporting agencies -- TransUnion, Experian and Equifax -- is available at no cost every 12 months. Check for errors; if mistakes are found, don't hesitate to dispute any and all inaccurate and derogatory items.
If you plan on moving out of your existing home within the next few years, it may not be beneficial for you to refinance. Make sure you let your mortgage specialist know your future plans.
It is feasible to go for a refinance when you have built up at least 10% equity in your home (For Fannie Mae owned mortgages, the value is 5%). It is also possible for you to choose the option if your equity is less than 5%, but you may have to pay a certain amount of cash in order to make up for the difference in equity.