XJ XJ8 / XJR ( X308 ) 1997 - 2003

Cooling fans not coming on, heater blows hot air

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Old Jul 4, 2012 | 12:01 AM
  #1  
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From: Los Gatos, CA
Default Cooling fans not coming on, heater blows hot air

Hi,

I just had taken off and on my front end when wiring my meth kit. When doing the test run, I noticed I was not hearing any cooling fan noise. The car was moving and I ran the heater and fan and it was blowing hot (not too hot) but blowing clearly hot enough air that the cooling fans should have been on.

Is there no indicator to show if I somehow managed to disconnect a cooling fan??

I don't yet have the realgauge hooked up, but will work on that very soon.

This is what I think I must have done (accidentally disconnected the fans) when putting the front end back on, I will check tomorrow when it is light out to try to fix.
 
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Old Jul 4, 2012 | 08:26 AM
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Check the fuse. Mine had blown and I only found out after a rad hose blew off in traffic. My Jag had a disagreement with a truck retread in the grille that had something to do with it (long story) that caused this.
 
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Old Jul 4, 2012 | 08:35 AM
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Turn the ac on and the fans should always be on. If not check both 30amp fuses in the engine compartment fb. If 1 fan motor fails youll loose low speed since it runs in series in low speed. High it goes parallel. Motors are now avail speratly
 
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Old Jul 4, 2012 | 09:41 AM
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I started the car this morning:

Cold=no fan
Turned on A/C with heater on = both fans running slow
Turned off A/C with heater on, fans still on slow

I'm not sure why the fan was not working last night but is now...I'll check it later after letting it come up to running temp.

As always, Thanks for the advice
 
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Old Jul 4, 2012 | 10:03 AM
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Originally Posted by WaterDragon
I'm not sure why the fan was not working last night but is now...I'll check it later after letting it come up to running temp.

As always, Thanks for the advice
THAT ALCOHOL IS METHANOL AND NOT THE DRINKING KIND. SO QUIT DRINKING THE METHANOL AND STICK TO BEER
 
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