Defect
Certain Mustang GT vehicles may not comply with C.M.V.S.S. 103 - Windshield Defrosting and Defogging. Coolant flow blockage at the intake manifold heater core nipple results in no coolant flow to the heater and, therefore, no warm air flow from the heater or windshield defroster.
Safety Risk
No risk description available.
Remedy
Dealers will repair the heater core nipple blockage and restore coolant flow.