membership upgraded . . .

I can't help you on your specific problem - I'd never even seen an AutoClear unit, much less worked on one. I did find some info, but it's limited since the product is discontinued:

http://www.polarispool.com/Support.aspx
(800) 822-7933
productsupport@zodiac.com

http://www.inyopools.com/manuals/739/polarisACplus.pdf (manual)

Good luck!