Engine & Internal Chat about beefing up your engine's insides here.

Rad Fan not coming on,

  #1  
Old 08-10-2005, 10:55 AM
HCF Member
Thread Starter
Join Date: Jul 2005
Location:
Posts: 100
Default Rad Fan not coming on,

My radiator fan does not come on,
my condensor fan comes on when I turn the air on, but the rad fan will not come on at all.
If I straight wire it to 12v it runs, but will not come on when the engine warms up.

2 qestions,
is the rad fan supposed to come one with the condensor fan?
what sensor tells the fan to kick on?

thanks,
Chris


________
GSX-R600
 

Last edited by chriskatana; 03-10-2011 at 03:38 PM.
  #2  
Old 08-10-2005, 11:21 AM
Join Date: Mar 2005
Location:
Posts: 34
Default RE: Rad Fan not coming on,

the sensor is located where the lower rad hose meets the engine. - ithink this is what your talking about. not sure if they come on together tho
 
  #3  
Old 08-10-2005, 09:53 PM
Senior Member
Join Date: Apr 2005
Location:
Posts: 2,448
Default RE: Rad Fan not coming on,

It will only come on when the motor gets hot.

Does it overheat?

Have you cheked the fuses?

The sensor is under the upper hose and just looks like little bullit connector sticking out of the block, easy to overlook
 
  #4  
Old 08-10-2005, 11:53 PM
HCF Member
Join Date: Jun 2004
Posts: 7,699
Default RE: Rad Fan not coming on,

i had an expensive problem a few years ago with that. actually, i didnt know it wasnt working, so it overheated enough to do some damage. but after the engine was fixed, it would still get a little hot sitting in traffic, and finally, i realized the fan wasnt on. i pulled the fuse a long time ago when it first started overheating, and it looked fine. turns out it burned out way down on the side where i couldnt hardly see it even when i had it 2 inches from my face. check the fuse really closely.
 
  #5  
Old 08-11-2005, 09:21 AM
HCF Member
Thread Starter
Join Date: Jul 2005
Location:
Posts: 100
Default RE: Rad Fan not coming on,

ORIGINAL: LEVIII

Does it overheat?

Have you cheked the fuses?

The sensor is under the upper hose and just looks like little bullit connector sticking out of the block, easy to overlook
It DID overheat, thus the blown head gasket
I want to KNOW that it's fixxed before it happens again.

I checked the fuses,

I kinda figured it was a sensor like that, the one on the tstat housing is just for the guage.

Anyone have a P/N for that sensor?

Thanks
Chris
________
Arizona Marijuana Dispensaries
 

Last edited by chriskatana; 03-10-2011 at 03:38 PM.
  #6  
Old 08-11-2005, 09:58 AM
Senior Member
Join Date: Apr 2005
Location:
Posts: 2,448
Default RE: Rad Fan not coming on,

Did you already get the gasket replaced?

Was the head warped?
 
  #7  
Old 08-11-2005, 10:00 AM
HCF Member
Thread Starter
Join Date: Jul 2005
Location:
Posts: 100
Default RE: Rad Fan not coming on,

I just had the head cleaned, presure tested, vacuum checked and surfaced.
No it was not warped, I'm going to put it together as soon as my gaskets get here.

Chris
________
Mercury monarch history
 

Last edited by chriskatana; 03-10-2011 at 03:38 PM.
  #8  
Old 09-02-2005, 11:14 AM
HCF Member
Thread Starter
Join Date: Jul 2005
Location:
Posts: 100
Default RE: Rad Fan not coming on,

it was the relay,
I replaced the coolant temp sensor and the fan switch,
when that didn't work I pulled the relay and tapped it on the ground a few times,
now it works,
BUT,
the fan only comes on when the temp guage reaches 3/4 then shuts off when it cools to 1/2.
Any ideas?
________
MAGIC FLIGHT LAUNCH BOX
 

Last edited by chriskatana; 03-10-2011 at 03:38 PM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
grove
Mechanical Problems & Technical Chat
1
08-20-2012 07:50 AM
bcrichguitars
Mechanical Problems & Technical Chat
10
01-15-2011 04:30 PM
SilverSedan
Mechanical Problems & Technical Chat
36
05-30-2010 10:31 AM
IslandCivic808
Mechanical Problems & Technical Chat
7
07-30-2009 03:10 PM
Garon
Mechanical Problems & Technical Chat
3
09-10-2007 01:12 PM


Thread Tools
Search this Thread
Quick Reply: Rad Fan not coming on,


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.