Coolant Leakage from Heater Core, Possible Leakage onto Passenger Side Foot Well on Ford Five Hundred

Electrolysis can cause repeated failures of the heater core and radiator. The diagnosing technician should check for voltage present in the coolant, with the battery disconnected, because electrical current in the coolant causes electrolysis. Corroded or deteriorated parts should be replaced, and the coolant should be flushed. Ground straps can be added to help prevent future corrosion of components.

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Average mileage: 139,000 (98,000–180,000)
3 model years affected: 2005, 2006, 2007
5 people reported this problem
1 person shared problem details
exactly the same issue
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