VFRDiscussion ARCHIVE / READ-ONLYREAD-ONLY

Malfunctioning thermostat?

3 posts Started 5 Jul 2011 Last recovered post 6 Jul 2011 Wayback Machine snapshot 7 Oct 2012

#1
Like most owners here I know when my 04 VFR is acting just a little bit strange. Generally on my ride to work, if it's below 70 outside, my bike runs at around 167-168, and stays there. This morning I was at 167-185 constantly. The temperature never stayed the same for more than a few seconds. Stopping at a stoplight the temps would immediately climb to 185. When I got to work I parked and left the bike running. The temperatures starting rising right away. In about one minute it was up to 230 and the fan never kicked on. Any thoughts? I let it cool down and checked and the coolant level is fine.
#2

[image: View Post]smiffer, on 05 July 2011 - 07:45 AM, said:

Like most owners here I know when my 04 VFR is acting just a little bit strange. Generally on my ride to work, if it's below 70 outside, my bike runs at around 167-168, and stays there. This morning I was at 167-185 constantly. The temperature never stayed the same for more than a few seconds. Stopping at a stoplight the temps would immediately climb to 185. When I got to work I parked and left the bike running. The temperatures starting rising right away. In about one minute it was up to 230 and the fan never kicked on. Any thoughts? I let it cool down and checked and the coolant level is fine.

I would be most concerned about the fan not kicking on.  170-220 is normal operating range.  That doesn't sound like a bad T-stat, but your fan should have kicked on around 220* to cool it back down.
#3

[image: View Post]Ryanme17, on 05 July 2011 - 03:48 PM, said:

[image: View Post]smiffer, on 05 July 2011 - 07:45 AM, said:

Like most owners here I know when my 04 VFR is acting just a little bit strange. Generally on my ride to work, if it's below 70 outside, my bike runs at around 167-168, and stays there. This morning I was at 167-185 constantly. The temperature never stayed the same for more than a few seconds. Stopping at a stoplight the temps would immediately climb to 185. When I got to work I parked and left the bike running. The temperatures starting rising right away. In about one minute it was up to 230 and the fan never kicked on. Any thoughts? I let it cool down and checked and the coolant level is fine.

I would be most concerned about the fan not kicking on.  170-220 is normal operating range.  That doesn't sound like a bad T-stat, but your fan should have kicked on around 220* to cool it back down.
:+1:

Check the fan switch connectors.
End of thread · 3 posts recovered Wayback Machine snapshot 7 Oct 2012