Is Apple doing repair to the late 2012 iMac's?

[edry.hilario]

Hi everyone, ive gone through three replacements and im still not happy with my imac, im sick and tired of going through the whole replacement hassle and not knowing if id get a issue free imac I DO NOT want to deal with that anymore. The current imac i have has very very low yellow tint and pretty evenly light, however i do have rattling sound coming from the fan. I was just wondering if any of you have done repairs to these imacs at your local apple stores? since i dont want to go through the replacement hassle i just want this very one to be repair. Any help will be greatly appreciated.