Our aircon probably needs to be replaced too. That mold problem we had last June I think due to a cleaning service guy's mistake of not cleaning well the aircon previously caused our aircon to accumulate water and therefore molds built up according to their own technician who checked on it.
Anyway, I wish it was just that easy to get a new one ~ financially that is. It would really eat up quite a big portion of our savings now. We do have the option to sell it then buy a new one perhaps. That will save us some money somehow.