Electric Fire Place - Help

Hello, I have a Electric Fire Place that can be turned on and off with remote control. For some reason the connection between remote and Fire place is gone. I called the mechanic last year and they fixed and the issue is repeating. The error message on the remote ""Your Appliance has been safely disabled. Please contact your dealer for service" i paid close to $350 last year and i do not want pay every year. Appreciate your thoughts and suggestions if there is a way to DIY. thank you.