I have a 12 year old Laars Lite 2 LJ nat. gas model that is not working. I am able to toggle from OFF to POOL, but the circle (which I believe indicates water pumping thru) is not rotating, no temperature reading - basically nothing happens. No codes appear as well. Does anyone know what this issue might be? I am thinking due to the age of the unit, I may just replace it. Any thoughts or advice is appreciated.