quick radiator fan question

chahny · 06-15-2004, 03:43 PM

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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GotTurbo · 06-15-2004, 04:23 PM

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

Bakergtt · 06-15-2004, 04:24 PM

I thought the two fans were for the radiator not the A/C?

GotTurbo · 06-15-2004, 04:29 PM

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

Charlie-III · 06-15-2004, 05:44 PM

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.

Bakergtt · 06-15-2004, 05:52 PM

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

White2.5GT · 06-16-2004, 09:52 AM

I have noticed lately that only one on mine comes on as well...I thought it was weird too....

chahny · 06-16-2004, 11:05 AM

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.

IronMonkeyL255 · 06-16-2004, 12:10 PM

WRXes have that too...?

I know in OBDI cars (like mine), those connectors are for checking engine fault codes.

subiekid · 06-16-2004, 12:17 PM

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.

chahny · 06-16-2004, 10:27 PM

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.

06-15-2004, 03:43 PM	#1
chahny Scooby Newbie Member#: 42750 Join Date: Sep 2003 Chapter/Region: MWSOC Vehicle: 1995 Legacy Outback Now 25% more Blue!	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 * Registered users of the site do not see these ads.

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06-15-2004, 04:23 PM	#2
GotTurbo Scooby Newbie Member#: 64186 Join Date: Jun 2004 Chapter/Region: Tri-State Location: Glendale, Queens NY Vehicle: 1998 A MONSTER SOON BMW STEEL GREY	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

06-15-2004, 04:24 PM	#3
Bakergtt Scooby Specialist Member#: 59207 Join Date: Apr 2004 Chapter/Region: NWIC Location: Oregon's OC Vehicle: '05 X was 98 LGTT	I thought the two fans were for the radiator not the A/C?

06-15-2004, 04:29 PM	#4
GotTurbo Scooby Newbie Member#: 64186 Join Date: Jun 2004 Chapter/Region: Tri-State Location: Glendale, Queens NY Vehicle: 1998 A MONSTER SOON BMW STEEL GREY	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

06-15-2004, 05:52 PM	#6
Bakergtt Scooby Specialist Member#: 59207 Join Date: Apr 2004 Chapter/Region: NWIC Location: Oregon's OC Vehicle: '05 X was 98 LGTT	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

06-16-2004, 09:52 AM	#7
White2.5GT Scooby Newbie Member#: 25142 Join Date: Sep 2002 Location: St. John's, Newfoundland, Cana Vehicle: 1998 Legacy 2.5GT White	I have noticed lately that only one on mine comes on as well...I thought it was weird too....

06-16-2004, 11:05 AM	#8
chahny Scooby Newbie Member#: 42750 Join Date: Sep 2003 Chapter/Region: MWSOC Vehicle: 1995 Legacy Outback Now 25% more Blue!	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.

06-16-2004, 12:10 PM	#9
IronMonkeyL255 Scooby Specialist Member#: 38120 Join Date: Jun 2003 Chapter/Region: South East Location: Greenville, SC Vehicle: 1991 Rio Red Legacy Turbo	WRXes have that too...? I know in OBDI cars (like mine), those connectors are for checking engine fault codes.

06-16-2004, 12:17 PM	#10
subiekid Scooby Guru Member#: 25516 Join Date: Oct 2002 Chapter/Region: NWIC Location: Send help, stuck in internet! Vehicle: 1995 Legacy TURBO!!! EJ22T/TEC3 & 06 MCS	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.

06-16-2004, 10:27 PM	#11
chahny Scooby Newbie Member#: 42750 Join Date: Sep 2003 Chapter/Region: MWSOC Vehicle: 1995 Legacy Outback Now 25% more Blue!	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.