Always compare the home loans rates out there and check with your mortgage broker about interest rates, fees, and features. Ask your mortgage broker to help you with a quote of how much it will might cost to switch from your current home loan to a new one. Use a loan calculator, and check out current interest rates.
Think about the loan term: will you still be making repayments in retirement if you refinance? How much more in interest do you end up paying if you refinance with a longer term mortgage?
Once you have these numbers you’re ready to do more research. Don’t forget, if your current or new loan is or will be 80% or more of the value of your home, you should budget for having to pay lender’s mortgage insurance.