That's about how long they were taking to fix mine, at least the ones they bothered to send back. I was told they couldn't get some of the components to repair the MA-800s anymore, might be why so many of mine were mysteriously unrepairable at just a couple years old.
Someone I know did an upgrade with about 40 of the new MA-850 units a few years back and he hasn't had much trouble with them, but as I said earlier I've lost all faith in IDX. I have a bad timer in a fragrance vac but I'll be converting it from IDX to Dixmor.