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Old 06-15-2004, 03:43 PM   #1
chahny
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Join Date: Sep 2003
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1995 Legacy Outback
Now 25% more Blue!

Default quick radiator fan question

When you turn the A/C on, should both fans turn on? Only my driver's side fan cycles on and off and I'm worried about proper engine cooling as it gets hotter outside.

Thanks

oh yeah, I searched using the terms 'fan or fans and a/c' and found too many useless results
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Old 06-15-2004, 04:23 PM   #2
GotTurbo
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well if ur drivin i dont think it matters that u have either fans on. the coolin from the car drivin will not be a problem. ill look at my car tonight and get bak to u
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Old 06-15-2004, 04:24 PM   #3
Bakergtt
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I thought the two fans were for the radiator not the A/C?
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Old 06-15-2004, 04:29 PM   #4
GotTurbo
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actually i think that ur right, those fans might not be for the a/c, i have a book on the car in my car. ill look at it tonight and get bak to u
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Old 06-15-2004, 05:44 PM   #5
Charlie-III
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Silver Sleeper Wagon

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Quote:
Originally posted by RiosubaGT
I thought the two fans were for the radiator not the A/C?
You are correct. But, they come on so the engine does not overheat.

Don't know if it is one or two fans that cycle though.
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Old 06-15-2004, 05:52 PM   #6
Bakergtt
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both of mine will come on I know that. kinda strange that only one would come on. maybe only both come on if its really hot?? I know mine comes on around 89 degrees but thats cuz of my LINK software. Wierd thou
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Old 06-16-2004, 09:52 AM   #7
White2.5GT
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I have noticed lately that only one on mine comes on as well...I thought it was weird too....
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Old 06-16-2004, 11:05 AM   #8
chahny
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Now 25% more Blue!

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Construction is in full swing in the home of the NBA Champion Detroit Pistons, so I get stuck in some stop and go traffic. When I turn on the A/C, the driver's side fan cycles and the passenger side fan does nothing. My temp gauge doesn't budge, so I'm not worried about overheating yet. When I push the A/C button, the engine sounds like it has to work extremely hard to drive the compressor and the fan noise is very loud. This is an apples to oranges comparison, but in my old Honda the A/C would activate one fan constantly and the other fan would cycle.

I'll check the connections with a multimeter tonight. Does anyone know if there's a jumper to put the ECU in diagnostic mode like the WRX? From what I've read, WRX guys have a green connector under the dash, when jumpered turns on the CEL and cycles the fans.

Thanks for the replies.
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Old 06-16-2004, 12:10 PM   #9
IronMonkeyL255
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WRXes have that too...?

I know in OBDI cars (like mine), those connectors are for checking engine fault codes.
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Old 06-16-2004, 12:17 PM   #10
subiekid
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EJ22T/TEC3 & '12 Civic

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Its normal for just one fan to come on, and then if the car sits any longer you will see the other fan to start.

And I think you will have two black connectors, or two green ones. I know I have seen one green connector.
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Old 06-16-2004, 10:27 PM   #11
chahny
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Now 25% more Blue!

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Found the green connectors and hooked them up tonight. Long story very short, 20A fuse was blown so I replaced it. Voila! Both fans worky.

Thanks again!

For those curious about the green connectors, when shorted they display stored CEL codes and cycle both fans in parallel; off, low, high, etc.
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