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September 30th, 2015, 02:26 PM   #21
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finally had a chance to install the new thermo switch ( Beck/Arnley 2011310 switch which is a 95C/91C) tonight along with a trailtech thermo gauge.

Gauge is on the hose coming off the return of the head maybe 3-4 inches up just before the thermostat

I nervously watched the Gauge climb to 210+ thinking damn something must be wrong!

But @ 215 the fan finally came on, woohoo

This was just idling in the driveway, and it didn't really come down at all, but i'm sure with movement this will be perfectly fine.
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September 24th, 2016, 08:29 AM   #22
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Looks like my thermo switch is gone again

Same symptoms as before, fan doesn't come on, but if I jump it across the terminals it spins up.

Anyone know of some possible reason a thermo switch unit could go out so fast?

I replaced this around 25 hours / 1000 km's of use ago. Thinking I should order 2 this time so i have a spare
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September 24th, 2016, 11:31 PM   #23
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Has the thermo switch been frozen???
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September 25th, 2016, 04:06 AM   #24
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Ordered 2 units from thewrenchmonkey.ca, 20 bux each so at least i'll have a spare on hand this time!

I've ridden in the winter with this last thermo and my timberseld snowbike kit installed, but it's never been left outside overnight or anything.

I'm heading outta town for business for a week, new switches should be here when i'm back and i'll get it installed asap.
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July 11th, 2017, 03:29 AM   #25
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bumping this... so my order got cancelled, and i had to source one from a local place (also had to order them in).

yesterday I was out riding and the switch is dead again. I can jump the pins and the fan comes on, so all the wiring/fuses are good.

this is now the 3rd thermo switch that's died on me in 2 years... wtf am I doing to kill these things?!

i'm going to hardwire a on/off switch inline so at least i have a manual backup.
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July 11th, 2017, 01:32 PM   #26
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Yes you can jump the pins, this is where you would hook your fan switch to

I would also look at a plugged rad as a air pocket will prevent coolant from hitting the thermos switch and making it come on. Take the switch out and put it in boiling water and see if it is working as it does sound funny that your going through switches. Are the rads low? where is the switch mounted? Lower part of rad of upper?
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July 11th, 2017, 05:50 PM   #27
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I had just put the bike back together several weeks ago and based on having so many fan issues, I purposefully let it run upto temp to ensure the fan kicked in.

And it did.

I've had 3 rides since then and just noticed this past ride that it was no longer triggering the fan.

I did have to leave the bike outside over night in the rain prior to this last ride, but no idea why that would kill the switch.

I'll try the boiling water idea and see how that goes. I assume I need to use a multi meter to measure it somehow?

Thanks for the help FE!
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July 11th, 2017, 10:18 PM   #28
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Rain/water and a electric switch not a good combination. At the very least Dielectric Grease on the switch or seal the switch some how.
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July 12th, 2017, 06:51 PM   #29
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Originally Posted by jeffk95z View Post
I had just put the bike back together several weeks ago and based on having so many fan issues, I purposefully let it run upto temp to ensure the fan kicked in.

And it did.

I've had 3 rides since then and just noticed this past ride that it was no longer triggering the fan.

I did have to leave the bike outside over night in the rain prior to this last ride, but no idea why that would kill the switch.

I'll try the boiling water idea and see how that goes. I assume I need to use a multi meter to measure it somehow?

Thanks for the help FE!
The rain in no way will cause a problem with the switch as it is sealed and a low voltage switch. Even if the water shorted the switch all that would happen is the fan would come on. It is a motorcycle designed to get wet
I however would not submerge the bike, but mine has been many times without incident.
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July 12th, 2017, 10:26 PM   #30
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You have heard of corrosion? Overtime. On this Forum people ask about electrical problems and water rain mud are reasons sometimes. Sometimes it's better to fix a problem before it starts.
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