A/C compressor tied to aux fan?
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 348
Likes: 4
From: Lexington, KY
Year: 1996
Model: Cherokee
Engine: 4.0
A/C compressor tied to aux fan?
'96 XJ here. I've noticed the auxilary elec. fan on my radiator only turns when the a/c compressor clutch wheel is spinning. Are they supposed to be tied together like that? And does this imply that the aux fan won't turn unless the a/c is on?
CF Veteran
Joined: Aug 2009
Posts: 1,127
Likes: 12
From: 9000 ft, CO
Year: 1999 XJ
Model: Cherokee
Engine: I6 4.0L
Disclaimer: The majority of my familiarity with the auxiliary fan is with OBDII, so I'm not 100% sure on this... someone correct me if I'm wrong. As I understand it, the A/C condenser (in front if your radiator) puts an extra thermal load on the cooling system, so your electric fan control is setup to run whenever your A/C clutch engages. It should also turn on when your engine temp reaches about 230°F, assisting the mechanical fan in passing cool air over your radiator.
Senior Member
Joined: Feb 2014
Posts: 793
Likes: 5
From: Southgate, Michigan
Year: 1997
Model: Cherokee
Engine: 4.6 I6
Disclaimer: The majority of my familiarity with the auxiliary fan is with OBDII, so I'm not 100% sure on this... someone correct me if I'm wrong. As I understand it, the A/C condenser (in front if your radiator) puts an extra thermal load on the cooling system, so your electric fan control is setup to run whenever your A/C clutch engages. It should also turn on when your engine temp reaches about 230°F, assisting the mechanical fan in passing cool air over your radiator.
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