Local auto parts Airtex fan switch PN 1S4375 cost $14.00. Bought second for backup.
3rd times a charm. 308 thermoswitch replacement #1 (noted Ferrari facility-$55) lasted 30 miles. Replacement #2 Federated Auto parts (VW) ($15) failed on 10 mile test drive. Replacement #3 Federated Auto parts ($15) working normally after extended drive through city and back roads under a variety of conditions. Suspicion #1 & #2 weren't factory new items.
