I returned my printer to Costco for a full refund and purchased a different brand. Costco will accept returns of printers for a full 2 years after purchase, my printer was 22 months old. Well worth the membership fee!
I too have this problem with the U052 error message. My printer is a different model from all I see on this forum: MX712. I sent an email to Canon support and received a quick response, however their solution is to charge me for a new printer at 25...
