Originally Posted by blkmagikca
Not sure about the Shurflo, but with the Fantastic fan there is a small contact switch that engages/disengages the fan motor when the dome is opened/closed. This switch is just like the ones used to open the lights in your car when the door is opened. The contacts can get dirty, and this would cause the fan motor to slow down.
Another thing we discovered was that the fan motor hum is the same as that of wasps, and they seem to be attracted to the fan. I can be camped in the middle of the Sonora Desert with no sign of life yet I'll have a half-dozen dead wasps on the fan screen.
This fan doesn't have the contact switch, although before we bought ours, we looked at a 19' that had that feature. The more I've read about the Shurflo, the more discouraged I get. MANY people have experienced problems with the motor and have replaced it, only to have it stop working a few weeks later.
One post I read said even the person he talked to at the company admitted the problem is the part is really cheap...made in China. I'll try calling Shurflo and see if they will send me one. They've apparently done this at no charge for others since they haven't lasted very long at all. Thank you so much for your help. And oh....YIKES about the wasps!
A phobia of mine.