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Registered User
Join Date: Dec 2010
Location: South Pasadena, CA
Posts: 242
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Yes, both fans should come on when the A/C is on. Lots of write ups on this.
Check the radiator fan fuses (Row C, #8 and #10, both 40A).
Check radiator fan relays (#19, 20, 21, 22). #19/21 control low speed, #20/22 control high speed. Durametric comes in handy for this so you can manually turn on the fans to test each of the relays.
Most likely the failure is the radiator fan ballast resistor (PN 996.616.101.00). It is around $100-$125. I have no idea why a friggin' resistor is so expensive.
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1999 996 C2 sold - bought back - sold for more
1997 Boxster BSR POC/PCA #254
1978 911 SC Daily Driver
Licensed DE/TT Instructor
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