Refinancing your home can give you extra cash to make home improvements, pay bills, etc. A home refinance can also give you a lower interest rate or get you out of trouble if you have fallen behind on your payments. However, getting a home refinance loan is serious business, and should not be taken lightly. Below is a list of the three most common, and most expensive, home refinance mistakes. Do everything you can to avoid making these errors.Mistake One: High Rate RefinancingYou should carefully consider the interest rate when refinancing. If your new interest rate is no lower than the current rate that you pay, refinancing may not be a good idea. Unless it is absolutely unavoidable, you should not refinance your home at a high interest rate.Mistake Two: Borrowing Too MuchBorrowing too much money is a common home refinance mistake. No matter how much money you borrow, you will have to pay it back. Consider this carefully before you decide to refinance your home. Remember, if you get a large loan and cannot make the large payments, you could be putting your home at risk.Mistake Three: Forgetting About Closing CostsWhen you refinance your home, you will have to pay closing costs. The amount that you pay will depend upon your financial lender, but expect to pay hundreds or even thousands of dollars upon closing. If you are unwilling to do this, or if you are unable to come up with the money, you may want to forget about refinancing and get a home equity loan instead. Home equity loans do not have closing costs.