both fans always on [Archive] - Subaru Legacy International

r3v_v3ng3

01-11-2011, 12:56 AM

98 lgt 5speed
both of my fans are always on and its killing my gas mileage specially this cold climate.
its been like that since i bought the car 2 years ago.
the a/c switch is not on
everytime it sees ignition both of the fan on hi speed i believe is on instantly, so its taking longer to warm up

any help is appreciated, thanks

ericem

01-11-2011, 03:21 AM

Do you have a check engine light? I would assume you have a coolant temperature sensor that needs to be replaced, or a stuck relay. Even possibly a bad ecu!

chuckthefuk

01-11-2011, 10:31 AM

I am with eric.. temp sensor.. its rare that the ECU fails ...

anothernord

01-11-2011, 12:43 PM

Definitely CTS.

r3v_v3ng3

01-11-2011, 01:50 PM

Do you have a check engine light? I would assume you have a coolant temperature sensor that needs to be replaced, or a stuck relay. Even possibly a bad ecu!

no check engine light, i'll replace the cts and see if thats the problem. thanks guys

r3v_v3ng3

01-15-2011, 02:21 PM

ok just got done replacing the coolant temp sensor (two prong) and its still doing the same thing. i also notice two other sensor for the coolant. one (one prong) is by the crank sensor, i think this is for the gauge and the other is near the cts that i replaced and it has one prong. could this be the fan switch?

ouch1011

01-19-2011, 01:47 AM

The one by the crank sensor is the oil press switch.

Does your cel come on with the key on/engine off?

r3v_v3ng3

01-21-2011, 01:11 AM

The one by the crank sensor is the oil press switch.

Does your cel come on with the key on/engine off?

just checked it right now. yes check engine light come on and stay lit on key on/engine off but no cel when its running