('09-'13) Only one fan spinning up - Subaru Forester Owners Forum
User Tag List

  • 1 Post By 2.5x_sleeper
Thread Tools Display Modes
post #1 of 4 (permalink) Old 05-20-2019, 03:01 PM Thread Starter
Forum Member
Join Date: Nov 2018
Location: Alpine, AZ
Posts: 14
Car Year: 2011
Car Model: Forester
Transmission: Automatic
Feedback Score: 0 reviews
Only one fan spinning up

Is there something in the system that makes only one fan spin up to cool the engine coolant unless the temperature is exceptionally high? I notice the other day when checking under the hood after pulling a hill that only one fan was in operation. I am getting set to do a radiator replacement and I am wondering if need to do a fan replacement too.

Thanks for the help.

Bmkrueger is offline  
Sponsored Links
post #2 of 4 (permalink) Old 05-20-2019, 05:39 PM
Forum Member
Join Date: Aug 2016
Location: Driving near Philadelphia PA
Posts: 737
Car Year: '17
Car Model: Impreza Hatchback
Transmission: CVT
Feedback Score: 0 reviews
If you have a wiring diagram, check to see if both fans are on the same relay or not.

You also can use test mode to turn on and off all the relays to ensure that fan can be energized. If that works, then maybe there is a separate thermostat for that unit? Again, a wiring diagram will be your friend!

https://www.subaruoutback.org/forums...est-plugs.html is one source of info about the test mode for the 2011 Forester.

Good luck and let us know what happens.

'17 Impreza HB
previous car: '06 Forester X
ILuvMySubaru2 is offline  
post #3 of 4 (permalink) Old 05-21-2019, 05:12 PM
Forum Member
Join Date: Jan 2006
Location: DFW
Posts: 306
Car Year: 2001
Car Model: Forester
Feedback Score: 0 reviews
According to service manual, the 2nd fan turns on if coolant is above a certain temperature or AC is turned on. If below certain coolant temperature, only one fan is used.

Sent from my Pixel XL using Tapatalk
bman400 is offline  
post #4 of 4 (permalink) Old 05-21-2019, 06:12 PM
スーパー モデレーター
2.5x_sleeper's Avatar
Join Date: Aug 2007
Location: Newberg, OR
Posts: 34,495
Car Year: 2007
Car Model: Forester Sports XT
Transmission: 4EAT
Feedback Score: 42 reviews
Perhaps this will help. I found this in the '09-'13 Subaru Technical service manual.


['07 FSXT MODding Journal] ['03 X MODding Journal]
Attached Thumbnails
Click image for larger version

Name:	'09-13_rad fan sys_operation conditions.jpg
Views:	17
Size:	174.0 KB
ID:	510293  
dave5358 likes this.

'07 FSXT - COBB Surgeline dyno stock Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport
2.5x_sleeper is online now  
Sponsored Links

  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Problems, Maintenance, and Warranty

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
CEL & secondary air injection fan will not stop spinning! Charmer Europe 6 09-20-2016 11:27 PM
('98-'00) P1520: Coolant Fan Relay 1 High Input. kberube Lighting and Electrical 4 03-31-2015 06:59 PM
('03-'05) How to test radiator fan relay & motor functionality? fozzynomad Problems, Maintenance, and Warranty 13 11-25-2011 08:30 AM
('98-'00) Cooling fan running on my 99 50pascals Problems, Maintenance, and Warranty 5 03-14-2009 05:42 PM
Primary Radiator Fan Problem X-Shadow EJ25 - 2.5L Turbocharged (2004-2013) 8 01-11-2007 06:21 PM

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 Off


Title goes here

video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome