[ponch]

If you will excersize the unit, every month or two, the fan will not freeze up.
Well I don't like the word never or not but you know what I mean.

I have fixed three or four of these out on the road for people just by loosening the fan up.

When it sits all winter especially in storage the fans lock up ,sometimes, from non use. Just get in the habit of starting up the unit so that the fan runs and you are in business.