Helpful Replyair con radiator fans

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ElwynChivers
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2018/03/12 21:27:20 (permalink)

air con radiator fans

hi,just noticed today when i started my car in the garage only one radiator fan was running,before i start investigating, should both fans be running, ? i did a check on fuses and all good, the fan running was drivers side and its  2003 carrera, regards
C2dweller
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Re: air con radiator fans 2018/03/13 06:56:07 (permalink) ☄ Helpfulby ElwynChivers 2018/03/13 07:20:11
The car has a two speed fan system.  It’s likely that speed 1 isn’t working and this will be due a ballast resistor which chokes the voltage down to lower the fan speed.  Fairly simple repair with Porsche parts.
 
Speed 2 (fast) is probably fine, as it uses a different circuit.  
 
Kind Regards Lee Jones 

Porsche Fanatic
Red 1 1989 964 Carrera 2
Red 2 1999 986 Boxster 2.7
Red 3 1990 944 S2 Cab
Red 4 1985 944
Red 5 1988 944 Turbo SE
Red 6 1981 924 Turbo
2007 Black 997 C4S For sale 27499
2006 Grey 987 Boxster S
1987 White 924S
1985 White 944
1981 Green 924 Turbo
ElwynChivers
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Re: air con radiator fans 2018/03/13 07:22:15 (permalink)
thanks for reply,i take it that the resistor is built into fan, regards
Richard_Hamilton
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Re: air con radiator fans 2018/03/13 16:57:30 (permalink) ☄ Helpfulby ElwynChivers 2018/03/13 18:16:48
No, it's a separate resistor.  One on each side:

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Richard
1989 3.2 Carrera Sport in Guards Red/Linen & Audi RSQ3
Previous:
2012 Cayman 2.9 PDK, 2006 Cayman S, 2000 996 Turbo, 1998 996 C2, 1994 993 C2
ElwynChivers
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Re: air con radiator fans 2018/03/13 18:16:19 (permalink)
thanks richard, let you know how i get on, regards
swiftus
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Re: air con radiator fans 2018/03/13 18:21:58 (permalink)
Ref the resistors:
Mine is a MY 2002, I changed the resistors last summer, but they don't look like that, mine fatter and green, the ones in the photo the earlier 'cigar' type resistor?  
The resistors cost about £200 for the pair and it turned into a big job as I had to remove the wheels, bumper, liners and both radiators/condensors to get access.  None of the connectors were reusable so I needed to solder new connectors as well.
I would do it again, but I'd allow 1/2 a day to do it.
I believe that the cigar type resistors are easier access and cut in.  I assumed the resistor type changed with the 2002 face-lift, but maybe it's one of the seemingly random turbo parts on the C4S? 
Hope that helps!
 

Have: 996 Turbo, 996 C4S
Had: Cayenne S, 993 C2, Carrera 3.2, 952, 944, 924, 924 Racer, 924
ElwynChivers
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Re: air con radiator fans 2018/03/14 07:37:43 (permalink)
thanks, im in middle of service and lucky enough to have my own workshop with lift, i have all pans and wheel arch protectors off as checking for leaks etc, so now is the time to do it. i have always been working on classics, some play golf, some have a man shed regards and thanks
ElwynChivers
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Re: air con radiator fans 2018/03/15 18:25:56 (permalink)
hi, got resistor from RS components, all up and running, thank to all
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