Running hot"
Racer
Joined: Sep 2006
Posts: 280
Likes: 0
With the AC off, the low speed fans come on at 226 & shut off at 216 so you are looking
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Perfectly normal, this is a common question, here is the lowdown:
C5 Cooling Fans Operation
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph
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Note: for "in-town" driving (under 35 mph) or waiting at a traffic light/drive thru, you can keep your car's temperature lower by turning on the A/C. The fan comes on a 185 F instead of 226 F.
C5 Cooling Fans Operation
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph
--------------------------------------------------
Note: for "in-town" driving (under 35 mph) or waiting at a traffic light/drive thru, you can keep your car's temperature lower by turning on the A/C. The fan comes on a 185 F instead of 226 F.
