2000 Subaru Outback engine fans

LORNA LINCOLN

MEMBER
2000 SUBARU OUTBACK
4 CYL
AWD
AUTOMATIC
151,670 MILES

Cooling fans do not operate unless ac is on

Sunday, February 8th, 2009 AT 7:05 AM

7 Replies

2CARPRO JACK

MECHANIC
11,533 POSTS

That car looks like thePCM tells the fans to come on via the coolant sensor. You may have a coolant sensor out of range. Otherwise you need to get a test light and see if the PCM is triggering the relay at the Green/red wire at the sub fan relay and the Red/blue wire at the main fan relay. Also check fuses 17, 18 and the 2 fuses in the A/C relay holder

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Monday, February 9th, 2009 AT 7:36 AM

BNC084

MEMBER
1 POST
2000 SUBARU OUTBACK

Engine Cooling problem
2000 Subaru Outback 4 cyl All Wheel Drive Automatic 127K miles

I just replaced my radiator with new thermostat and coolant. When the engine warms up, the cooling fan kick in but never shut off and do not know if this was existed before the repair and did not noticed it or just started after. So this is the basic trouble shooting I have done:
I turned off the engine and turn the ignition on only and the fan start to run and shuts off after I minute but it does not shut off while the engine is running.
Has anyone running into similar problem? I do not know if this is cooling sensor issue, relay or some thing else.
Thanks.

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Thursday, December 5th, 2019 AT 1:23 PM (Merged)

RASMATAZ

MECHANIC
75,992 POSTS

Check the thermostat if its the correct temperature for the engine.

Try the coolant temperature sensor could be out of range and telling the computer that the engine is gettig hotter than usual and computer constantly energizing the relay.

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Thursday, December 5th, 2019 AT 1:23 PM (Merged)

JLEWS80

MEMBER
1 POST
1998 SUBARU OUTBACK
4 CYL
AWD
AUTOMATIC
114,000 MILES

I have a problem with my radiator fan always running when ever the car has power. Both fans come on and one goes from high to low. The temp guage goes to about 1/4 even when the car is cold.
I have tried to disconnect the temp sensor to see if that was bad but it would stay on. I bought a new ECU but that didn't work either.
Please help!

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Thursday, December 5th, 2019 AT 1:23 PM (Merged)

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

Check the a/c radiator fan relays. Should be 3 (main fan relay #1 & #2 as well as Sub Fan Relay #2). All located in the a/c relay holder, on left side of engine compartment.