Author Topic: Why does the Fan come on at such a high temperature?  (Read 218 times)

youngster

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Why does the Fan come on at such a high temperature?
« on: May 20, 2017, 06:55:54 PM »
HD200 has been running hot. I noticed the temperature gauge starts to climb whenever I'm stopped. I started wondering why the fan isn't kicking on to get air flowing through the radiator (like it does when I'm moving). Turns out the Fan switch is supposed to turn on at between 208-215 Farenheight, but mine isn't turning on at all.

So I can spend $60 for a new switch but I'm thinking why not just bypass the switch altogether and have the fan running all the time. That seems like a really high temperature anyway.

I guess the downside is that my fan will wear out faster, always being on.

redridinghood

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Re: Why does the Fan come on at such a high temperature?
« Reply #1 on: May 20, 2017, 07:52:12 PM »
Did you check the fuse?

The fan switch might be faulty...but so might the fan...or the wiring...

You could test the fan by disconnecting it and running jumper wires from the battery to the fan

SYM doesn't make fan switches...too bad there's not some master cross-reference chart for every vehicle on the planet...there's a switch to fit your scooter for a fraction of that $60 at your local auto parts store...

Jump behind the parts counter and find it! 😜

Your wiring diagram? http://www.jeffs-hotsauces.com/hd200wiring.pdf

youngster

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Re: Why does the Fan come on at such a high temperature?
« Reply #2 on: May 20, 2017, 08:45:35 PM »
That is a good idea. Maybe I can find a switch that runs the fan at a lower temperature. I want it coming on at around 180 degrees

Tromper

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Re: Why does the Fan come on at such a high temperature?
« Reply #3 on: May 21, 2017, 01:44:20 AM »
One of mine was being fussy like that until I did a flush and fill, that seemed to clear it up.
08 SYM HD200
07 Suzuki Burgman 650

youngster

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Re: Why does the Fan come on at such a high temperature?
« Reply #4 on: May 21, 2017, 09:31:26 AM »
BTW

I found a thermo switch that kicks the fan on at 190 degrees. I like that lower temperature a lot better. This only cost me $11 so remains to be seen if it actually works.

I'm up to 25,000 miles on my scooter now. I wonder how much longer it will go... ?

scosgt

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Re: Why does the Fan come on at such a high temperature?
« Reply #5 on: May 21, 2017, 03:27:17 PM »
The radiator is made by CF Moto
The same fan switch works
Easy to find cheap on ebay.
And yes, I have the 190 degree switch installed.