My hampton Bay ceiling fan only works on one speed. When I try lo and medium you can see the fan is trying then stops and continues on high. Is there a fix.

How long have you had the fan?

Tried replacing batteries on remote?

Checked dip switches?

Check this page - and read the part about adjusting the dip switches (http://www.ceiling-fans-n-more.com/ceiling-fan-remote-controls.php). Read the other troubleshooting steps too