We have a Fan-Tastic Vent 6600R with the 3 button 417RF remote. We've been happy with its operation (the rain sensor/auto-close even works as it should). However, during this past week the remote had to be within a foot of the vent to get the fan to respond.<br/>After changing the batteries and 'reprogramming' the remote a few times to no avail, I called Fan-Tastic Vent...