On Wed, 09 Dec 2015 22:57:41 -0500, wrote:

If the OP is getting water in the blower something is not set up
properly - for sure. He's likely got a backslope on the vent, and the
vent is likely too long, so he's getting condensation in the pipe, and
it's running back to the heater instead of running out the vent.

The water may have had something to do with the motor failing and the
pressure switch going bad.

As pointed out in another followup, you have to go uphill in most
installations. This is what what they do to keep the condensate from going
back into the fan:

http://donwiss.com/pictures/misc/CondensatePipe.jpg

Don. www.donwiss.com (e-mail link at home page bottom).