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Old 04-16-2011, 01:03 AM   #1
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Unhappy Help! cooling fan comes on full speed when ignition on

Both A/C and radiator fans come on fully when ignition on~no matter cold or hot
anyone knows what cause that?~
Thank~
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Old 04-16-2011, 08:07 AM   #2
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Both A/C and radiator fans come on fully when ignition on~no matter cold or hot
anyone knows what cause that?~
Thank~
Well, the radiator one runs off a thermostatic switch - sounds like its gone bad or there's a problem with the wiring harness to it. The other possibility is that the fan relay has gone bad.
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Old 04-16-2011, 09:02 AM   #3
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Do you have the A/C button pressed? That surprised me once too. My wife had turned on the A/C and then whenever I turned on the key I kept hearing the fans go on.
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Old 04-16-2011, 10:03 AM   #4
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Do you have the A/C button pressed? That surprised me once too. My wife had turned on the A/C and then whenever I turned on the key I kept hearing the fans go on.
That's my guess too. Cooling fan is ALWAYS on when the A/C is on.
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Old 04-16-2011, 02:10 PM   #5
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That's my guess too. Cooling fan is ALWAYS on when the A/C is on.

The blower fan has to be on too - it won't do it with just the button pushed on mine.
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Old 04-16-2011, 02:32 PM   #6
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Well, the radiator one runs off a thermostatic switch - sounds like its gone bad or there's a problem with the wiring harness to it. The other possibility is that the fan relay has gone bad

this is good advice.
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Old 04-16-2011, 02:32 PM
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cooling, fan, fans, full, ignition, key, prizm, radiator, relay, s2000, sounds, speed, turn, turned, wiring


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