Fan not working properly - 600RR.net
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post #1 of 10 (permalink) Old 04-29-2015, 07:18 PM Thread Starter
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Fan not working properly

Hopefully im posting in the right forum. So my 04 cbr 600rr just started getting really hot and i noticed the fan wasnt kicking in, temperatures got up to 240, so i turn off the bike, let it cool down, and then after 20 minutes i turned it on and fan was on at all times even at low temperatures. Anyone knows what it could be? Fan either turns on and stays on at all temperatures or doesnt turn on at all. I changed my coolant and still have the problem
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post #2 of 10 (permalink) Old 04-29-2015, 07:53 PM Thread Starter
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Update, i was jist riding and fan kicked in at 200 degrees and stayed on even when temperatures were low. I have no idea whats wrong

Last edited by Jonalexander19; 04-29-2015 at 07:53 PM.
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post #3 of 10 (permalink) Old 04-29-2015, 08:28 PM
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There is a temp sensor that sends a changing resistance to the ECU, and it determines when the fan runs.
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post #4 of 10 (permalink) Old 04-29-2015, 08:50 PM Thread Starter
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There is a temp sensor that sends a changing resistance to the ECU, and it determines when the fan runs.
So the sensor its bad you think?
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post #5 of 10 (permalink) Old 04-29-2015, 09:25 PM
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If you get good readings on the dash, the sensor should be good.
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post #6 of 10 (permalink) Old 04-29-2015, 10:49 PM Thread Starter
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Yeah im pretty sure the readings are correct so any idea what the issue could be?
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post #7 of 10 (permalink) Old 04-30-2015, 12:16 AM
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Could be a relay that is not operating correctly?
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post #8 of 10 (permalink) Old 04-30-2015, 05:45 AM
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Could be that the fan is toasted too... Try to pluging it directly to the battery to see if it runs...



Honda CBR600RR 2003 - Gone! (the blond)

Honda CBR600RR 2007 - On the road! (the brunette)
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post #9 of 10 (permalink) Old 04-30-2015, 11:46 AM Thread Starter
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Originally Posted by Soponcio Virtual View Post
Could be that the fan is toasted too... Try to pluging it directly to the battery to see if it runs...
Yes fan works. Sometimes it kicks in and sometimes it doesnt
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post #10 of 10 (permalink) Old 05-04-2015, 11:58 AM
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I would try and get the relay replaced... Specially if it is an intermitent problem...

You thermostat would fail all the time if it was faulty/broken



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