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Old 06-05-2009, 10:42 PM
Bio300TDTdriver Bio300TDTdriver is offline
Unofficial wormcan opener
 
Join Date: Dec 2005
Location: Ashland, MA
Posts: 2,602
Quote:
Originally Posted by gsxr View Post
The red switch turns the fan on low speed at 16 bar (232 psi), and turns the fan off at 12 bar (174 psi). Pressures above 300psi should have been way more than enough to trigger the fan (that's even high enough to trigger the old green switch, which needed 290 psi). If you can short the leads of the red switch and make the fan turn on low speed, it sure sounds like a bad switch... bad news is, the system has to be discharged to replace it, then vacuum pulled, and re-charged...




Note: If you are jumping the fan on HIGH speed, using the switch on top of the engine... then check the aux fan resistor. If that's bad, the fan will work on high speed, but not low.



Best regards,
Thanks Dave. The fan would only come on high when I jumped it at the 100/110 switch. When jumped at the new A/C switch it wouldn't do anything. So I'll keep my fingers crossed that it is the resistor.

Where is the aux fan resistor located? Do I check it for power or......?
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