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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
Welcome to this forum! Check the hard plastic vacuum line along the side of the box with the blower motor. This line has rubber fittings, and a check valve. You might have to replace the tubing or the rubber fittings since they crack when they age.