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I was out for a ride on the weekend and hit the first medium sized hill and the machine started cutting out. Looked down at the gauges and the temp light was flashing. Machine was cutting out and going in to safety or limp along mode. Once I let it cool down for a while it was fine and was okay in general until I hit tight trails at slower speeds where it wasn't being air cooled. The temperature outside was pretty hot around 27C or 80F. It was hotter than i would normally ride in, however the machine should be able to handle this as I wasn't even really pushing it. Heck the thing would get alot hotter when being worked hard or when playing in the mud where there is not much chance for air flow to keep things cool.

I checked out the overflow bottle and there was lots of coolant. Checked for kinks in the hose connected to the rad and it was okay. Rad wasn't caked with mud or anything. Checked and the fan is running. Only wierd thing I found was that the fan takes a few minutes to kick in when I restarted the machine immediately after the problem occured and it hadn't had a chance to cool down.

So this leads me to some questions that I thought someone on here might be able to help out with.

1.) what is too hot, if such a thing?
2.) does anyones fan continue running when the engine is off, yet the key is still in the on or aux position?
3.) when I restarted the engine shouldn't the fan kick in immediately if the engine is still extremely hot?
4.) is there a thermostat that i can easily take off and check to ensure it is spring is opening correctly, or would this be electronic and not mechanical?
5.) planing to take it to the dealer as it should be covered under warranty, does it have to be the place of purchase, or any polaris dealer?

Any help would be appreciated. Less than 200km and it is a bit early to be having issue.
 

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I have had this happen a couple of times with my 850 touring with less than 300km and I am also trying to narrow it down.

I too wonder if it was actually hot as stopping and throwing the gear shifter into N or P shut the temp light off.

My fan also will not continue to run with the key on but engine not running (my '09 800 would continue).

Shutting the key off and restarting immediately cleared mine which I also found strange if the engine was actually too hot.

Now the one day it happened I can understand it if it was for real because we were on sloppy trails all day and then some fast roads on way home. But with all the water that day I still thought it might be electrical because my eps light came on a couple of times.

This past weekend it happened after going through a couple of medium deep mudholes and rescuing a couple of smaller bikes. The light came on about 20 minutes later on tight slow trail. I checked the rad and the bottom 3rd had a little mud but the top 2 3rds were as clean as new. The following day I was rack deep several times and extremely muddy from pushing and winching out my buddies and had no lights come on or heat issues of any kind...In fact at times it was steaming off the moisture as they should.

Besides the folks in this forum I will certainly be giving to my dealer a couple of times while under warranty with my inquiries. I am also considering a coolant additive like purple ice or water wetter.
 

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I was looking in the sportsman XP section and overheating fortunately does not seem to be too common. One post for a 2011 sounded similar to yours. It ended up being an issue where the fan would some on but was running slowly. They replaced the fan circuit breaker since they noticed pushing on it made the fan rotate faster.

http://www.polarisatvforums.com/forums/polaris-xp/33261-2011-sportsman-850-xp-overheating.html

I know when the fan comes on mine you know it. Very loud and moving a ton of air. I dont play much in the mud but it was getting pretty hot bogging down in the sand but did fine. Key off when fan running due to it being hot then back on again fan will not run for a while.

Hope dealer can help, that is always a mixed bag.
 

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I was out for a ride on the weekend and hit the first medium sized hill and the machine started cutting out. Looked down at the gauges and the temp light was flashing. Machine was cutting out and going in to safety or limp along mode. Once I let it cool down for a while it was fine and was okay in general until I hit tight trails at slower speeds where it wasn't being air cooled. The temperature outside was pretty hot around 27C or 80F. It was hotter than i would normally ride in, however the machine should be able to handle this as I wasn't even really pushing it. Heck the thing would get alot hotter when being worked hard or when playing in the mud where there is not much chance for air flow to keep things cool.

I checked out the overflow bottle and there was lots of coolant. Checked for kinks in the hose connected to the rad and it was okay. Rad wasn't caked with mud or anything. Checked and the fan is running. Only wierd thing I found was that the fan takes a few minutes to kick in when I restarted the machine immediately after the problem occured and it hadn't had a chance to cool down.

So this leads me to some questions that I thought someone on here might be able to help out with.

1.) what is too hot, if such a thing?
2.) does anyones fan continue running when the engine is off, yet the key is still in the on or aux position?
3.) when I restarted the engine shouldn't the fan kick in immediately if the engine is still extremely hot?
4.) is there a thermostat that i can easily take off and check to ensure it is spring is opening correctly, or would this be electronic and not mechanical?
5.) planing to take it to the dealer as it should be covered under warranty, does it have to be the place of purchase, or any polaris dealer?

Any help would be appreciated. Less than 200km and it is a bit early to be having issue.
engine Ice my dads 850 had lots of over heating problems, mine did not, mibe always has ran engine ice séance day 1
 

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Be sure to examine your radiator fins CLOSELY! I had the same issue and was stumped because at a glance the radiator didn't seem clogged. Upon closer inspection the fins on one side had sand built up from riding though a few creeks here and there and the occasional small mud hole. I don't have silverbacks or outlaws and no kind of lift so I don't hit holes that you could sink in so don't assume I've sunk it a time or two. But over time a little bit of sand and dirt will accumulate over time and is very hard to wash out. I've found it best to pull the front clip and run a high volume of low pressure water (garden hose with spray nozzle) and not to use a pressure washer as it will bend the fins of the radiator, further reducing airflow across it. You may not have the same situation but its worth the few extra minutes it takes to pull the front clip and inspect it for any build up than to run a pressure washer wand it there and think its doing the job. Just my .02¢
 

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Mine never overheated during my last ride but it definately ran hotter the more mud that built up in the cooling fins. We used a small sump pump and hose at the rivers and would wash out the radiator and mud just poured out of the fins. We would also carefully pressure wash the radiator after each days ride at the car wash and never had an issue. My friend with a Brute Force had just replaced his radiator with an aftermarket one that is a monster but still had cooling issues but still hadn't came up with a good guarding system for the radiator so we just had to clean his radiator more often. If you are riding mud it's just part of the game to keep those damn fins clean. However, I believe you have a mechanical or electrical issue to deal with as mine would run hotter but never overheated and we rode some serious mud.
 

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Make sure there is no air in the system. Purge system of all air and see where that takes you :)
 

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Good tips from everyone...much appreciated.

A couple of questions?...when purging your system to get rid of air what would be the best way to go about that to be sure you don't unintentionally create an airlock?

And, I was looking for clips or something up front to gain better access to the rad or remove the screen and didn't notice anything obvious...are you guys removing the fan/shroud or the screen in front?

Thanks
 

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This is what i would do..
take rad cap off and start machine..
let run and slowly add coolant, letting air bubbles work themselves out the top of rad.

give it a little bit of gas here and there. When coolant is at very top and rising from the qaud being warm replace cap.

fill overflow to MIN line.

let qaud run at operating temp. shut down let cool

open rad cap and add if needed in both rad and res.
This might have to be done a few times
 

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What I mean by the front clip is the front plastic that houses your headlights. There are a few bolts holding it on and a few push locks by the fenders and you have to disconnect your headlights and it comes right off. It gives you the best access to the front of your radiator and better visibility of the fins that may be packed with dirt, sand, mud, etc. As far as the pressure washer goes I have bent some of the fins on mine from pressure washing and that is why I recommend against using them. Best of luck to you and I hope you pinpoint your issue soon.
 

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To make sure there is no air bubbles in the system, remove radiator cap, start machine, let idle till fan comes on, re-fill .
 

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had the same problem, dealer remplaced the fan relay or something like that, and now it works well, never overheat in any conditions

the fan was turning, but not fast enough
 

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had the same problem, dealer remplaced the fan relay or something like that, and now it works well, never overheat in any conditions

the fan was turning, but not fast enough
Thanks...that was mentionef before and after going through all of the other suggestions over the weekend I am thinking that it is the fan speed. My coolant was good with no airlocks and i could see through every part of my rad.

But I noticed that when the fan came on to cycle I could barely hear it or tell it came on with bike just idling. With my old 800 touring you would swear a jet fired up when the cooling system cycled.

This issue goes on the list for warranty at the dealer :)

Thanks for all help.
 

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had the same problem, dealer remplaced the fan relay or something like that, and now it works well, never overheat in any conditions

the fan was turning, but not fast enough
Thanks...that was mentionef before and after going through all of the other suggestions over the weekend I am thinking that it is the fan speed. My coolant was good with no airlocks and i could see through every part of my rad.

But I noticed that when the fan came on to cycle I could barely hear it or tell it came on with bike just idling. With my old 800 touring you would swear a jet fired up when the cooling system cycled.

This issue goes on the list for warranty at the dealer :)

Thanks for all help.
yeah thats it, when mine was overheating I could barely hear it too, now I hear it really well
 

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What about a faulty thermostat? Idk.. on a better note.. iI'm thoroughly impressed with the way mine stays cool I was riding in 95+ degree weather in Alabama this past weekend running balls out hitting huge mud holes even with my radiator caked in mud no problems... i actually thought I had a problem I had so much mud on the damn thing it stuck to the fan causing it to become uunbalanced sounded terrible anyways hope you get it sorted out
 

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When i first took mine out for the first time ride, i had the oil/engine light come on and it went into that " LAG MODE" mind you this was in the middle of december in Wisconsin..So dragged it up from the field i was in... brought it up to the house and it was running fine until you give it gas...Took it in and found out it was a T MAPPING SENOR.. from which my understanding is it tells the fan to kick in and it wasnt.
 

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My 2013 Sportsman 850 was overheating after about 30 minutes of continuous riding. When first starting out, the fan would run every few minutes. After about 30 minutes, the temp light would flash, the machine would go in to "limp mode", and the fan would try to spin, but never fully kick on. If you watched the coolant overflow, it would fill up as coolant bubbled over from the radiator.

I talked about this with the tech at my dealer and he said that he got 3 other similar calls on 850s. There is a circuit breaker in a wiring harness that heats up over time and this prevents the fan from running. Apparently it gets hot to the touch. He mentioned that the breaker is 20A, but it's suppose to be 10A. He replaced mine and I rode for about 2 hours on Saturday with no issues at all.

Unfortunately, he couldn't show me where the breaker was and I didn't get a print out of the part number replaced and what it was replaced with.
 

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that breaker si on top of the battery taped on the wiring harness, little metal box, alot of heat get there from the rad and the fan...

now I keep a jumper wire I made just in case...
 

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my 850xp just overheated this past sat, it wuz also 88-90* outside and riding a sand track...about an hour after i started the bike went in2 limp and red overheat lite went on...pulled by some shade, turned bike off and waited lil bit 2 cool down...after that didnt seem 2 have a prob...call the dealer...tech said the 850 engines do get hot and like 2 be run at higher speeds...im gonna try add some coolant additive and see if that works, if not then ill try and get the fan relay replaced under warranty !!!
 
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