Some 2011-14 Fiesta models may produce little or no heat from the dash registers in snowy weather.
One likely cause for the trouble, Ford said, is a frozen blower motor due to snow or freezing rain entering through the top area of the cowl panel. The precipitation then works its way down into the blower motor and refreezes during an overnight soak.
Replacing the cabin air filter and bulkhead screen with updated components (Part No. BE8Z-19N619A and D2BZ-18D395-A, respectively) should help prevent future moisture intrusion into the blower housing.
If the blower motor doesn't operate after installation of the new parts, check for an open No. 4 fuse in the power distribution box. It probably blew when the frozen blower motor was activated by the dash switch.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].