A momentary loss of power steering can occur when the AC or defroster is on during high humidity conditions. This is due to condensation from the evaporator draining onto the serpentine belt. To fix the problem, a spout on the AC evaporator drain and a new serpentine belt should be installed. Some vehicles may need a revised serpentine belt tensioner.Google+
Car Problem Reports
Chrysler Town & Country Momentary Loss of Power Steering Due to Water From the Evaporator Drain on the Serpentine Belt
Chrysler Town & Country Problem
Visitor, 1998 Chrysler Town & Country
Wet roads if you hit a mud puddle or a lot of water on road belt will come off. We have replaced pulleys serentine belt and tensioner several times .