Fan Not Cycling - Harley Davidson Street Forum - Street 500 and 750
User Tag List

LinkBack Thread Tools
post #1 of 4 Old 09-06-2016, 11:39 AM Thread Starter
Junior Member
Join Date: Nov 2014
Posts: 28
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
(Thread Starter)
Fan Not Cycling

Hi All,

I think I am having an issue but I am not really sure. Last week my the bottom radiator hose came off of my 750 on my way to work. My local HD dealer came and picked it up and replaced the the clamp and refilled the system. Since then, the bikes radiator fan operation has changed. It used to come on and go off at random while I ride, usually when I am stuck at a light or in traffic, but it would then turn off once I got moving again. Now it comes on and stays on for the duration of the ride, never shutting off until the bike is shutoff (even then it takes several minutes for it to shut off). Any ideas?

jackryan172 is offline  
Sponsored Links
post #2 of 4 Old 09-06-2016, 04:52 PM
Senior Member
Solo750owner's Avatar
Join Date: Jul 2014
Location: Northern Ozaukee County
Posts: 490
Mentioned: 1 Post(s)
Tagged: 6 Thread(s)
Quoted: 145 Post(s)
Might be a problem with the thermostat as well especially if it isn't regulating properly. I would take the bike in and have that checked on their dime.
Solo750owner is offline  
post #3 of 4 Old 09-06-2016, 08:19 PM
Senior Member
Tucsonmax1's Avatar
Join Date: Aug 2015
Location: Trenton, NJ
Posts: 1,236
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 205 Post(s)
Possibly Air trapped in the system. Scan tool (Or FP3) would show the Temperature of the engine. And when it reads above a certain point, The Fan turns on.

The Radiator Cap is underneath the Gas Tank.

2019 Hyundai Kona SE Surf Blue

2018 Custom 1200 Black Tempest
Tucsonmax1 is online now  
post #4 of 4 Old 09-08-2016, 05:24 PM
Join Date: Oct 2015
Location: San Antonio, TX
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
The fan is supposed to come on at like 200-210 range if I'm not mistaken. If it's staying on all the time, either your bike is running above that temp all the time (could be an air bubble in the cooling system) or you have a bad thermocouple on the fan causing it to think it's running hot. Take it back to HD and let them sort it out.
MacGyverDXS is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Windshield, not a fan Mullet Harley-Davidson Street Parts & Accessories 6 08-23-2016 11:24 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome