If you do not plan on staying in the house very long, refinancing may not be in your best interests.
There is no such limit on the number of times you can go for home refinance loans. Most lenders prefer that you have no late payment for the past 12 months before you switch over to a new loan.
When it comes to lowering your rates you will need to weight the benefits of having a lower rate vs. paying points up front. You may end up paying a lot more depending on your choice and how long you plan on keeping your mortgage.
If you have a mortgage, you should keep an eye on rates-especially if you have an adjustable rate mortgage. Getting locked in at a lower, fixed rate can save you hundreds, possibly even thousands, of dollars over the life of your loan.