Refinance Home Loan

can you refinance a home equity loan to lower the payments?
My mother signed a home equity loan with my grandfather who has just passed, and I am trying to help her pay the bills but the payment on the house is too high. If she refinances could her payment go down? Are there any other options, or any kind of loans or help from anywhere? I am totally clueless this was very unexpected.
If she has the income she can get a different mortgage and they will pay that one off. If her interest rate goes down and fees aren’t high the payment could be less.