Chrysler Voyager Forum : “water in blower”

water in blower

i) Im getting water in the heater blower (seems to be when it rains).  
Any ideas how it can be getting in there ? (can hear water sloshing when blower turns)  
ii) ... and any ideas how to drain the water out ?   
iii) The blower is now running only very slowly (I guess damaged by the water) any advice on servicing/repair/replacement ?
Many thanks !!