Radiator Fan Only Works on High Speed

JuniorTT · 06-05-2010, 04:45 PM

'03 ION 2.2L

Whenever I use A/C or defrost, the radiator fan comes on like it's supposed to, but it always runs at high speed. I've confirmed it's not caused by the two fuses under the hood.

What else could it be?

davidsky · 06-05-2010, 05:57 PM

The blower motor resistor has likely failed

JuniorTT · 06-05-2010, 07:08 PM

Quote:

Originally Posted by davidsky

The blower motor resistor has likely failed

Does GM sell it or do I have to go the Radio Shack route? Where is it located?

ssicarman · 06-05-2010, 07:34 PM

Are you talking about the rad fan or the blower in the car?

Rad fan on the ION's should only be a single speed one.
If it is the blower then as davidsky said the blower motor resistor is the most likely cause.

2006 ion2 · 06-05-2010, 09:21 PM

they must mean the blower motor, not the radiator fan. the resistor pack, or wiring could cause this.

JuniorTT · 06-06-2010, 07:43 AM

Quote:

Originally Posted by ssicarman

Are you talking about the rad fan or the blower in the car?

Rad fan on the ION's should only be a single speed one.
If it is the blower then as davidsky said the blower motor resistor is the most likely cause.

I'm talking about the rad fan. Only single speed...really?? It's clearly running wayyy faster/louder than ever before. My repair manual (Haynes/Chilton) talks about the fan control module using relay(s) to regulate low/high speed with some PCM involvement too. But the manual cops out and basically says to take it to the dealer once you know it's not a fan motor or fuse issue (and I've already ruled those out).

davidsky · 06-06-2010, 10:38 AM

Totally missed the radiator fan part, sorry about that. Mine is real loud as well but I'm too lazy/poor to have a look at it.

ssicarman · 06-06-2010, 11:03 AM

Quote:

Originally Posted by JuniorTT

I'm talking about the rad fan. Only single speed...really?? It's clearly running wayyy faster/louder than ever before. My repair manual (Haynes/Chilton) talks about the fan control module using relay(s) to regulate low/high speed with some PCM involvement too. But the manual cops out and basically says to take it to the dealer once you know it's not a fan motor or fuse issue (and I've already ruled those out).

Wiring diagram for the cooling fan only shows one relay.
If the rad fan seems noisey check for a damaged fan or blockage in the condensor rad assembly.

06-05-2010, 04:45 PM	#1
JuniorTT New Member Join Date: Jun 2010 Posts: 4	Radiator Fan Only Works on High Speed '03 ION 2.2L Whenever I use A/C or defrost, the radiator fan comes on like it's supposed to, but it always runs at high speed. I've confirmed it's not caused by the two fuses under the hood. What else could it be?

06-05-2010, 05:57 PM	#2
davidsky Master Member Join Date: Jun 2004 Posts: 3,962 davidsky's Photos 2005 ION-1 Sedan	Re: Radiator Fan Only Works on High Speed The blower motor resistor has likely failed ... Member of the Crank Window Club

06-05-2010, 07:34 PM	#4
ssicarman Super Member Join Date: Oct 2000 Location: Western Canada Posts: 10,470 ssicarman's Photos	Re: Radiator Fan Only Works on High Speed Are you talking about the rad fan or the blower in the car? Rad fan on the ION's should only be a single speed one. If it is the blower then as davidsky said the blower motor resistor is the most likely cause. ... A lousy day in paradise is still a day in paradise.

06-05-2010, 09:21 PM	#5
2006 ion2 Master Member Join Date: Jun 2007 Location: Da U.P, EH! Posts: 8,863 2006 ion2's Photos 2007 ION-2 Sedan	Re: Radiator Fan Only Works on High Speed they must mean the blower motor, not the radiator fan. the resistor pack, or wiring could cause this. ... 2007 Saturn Ion 2 2003 Chevrolet venture lt trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

06-06-2010, 10:38 AM	#7
davidsky Master Member Join Date: Jun 2004 Posts: 3,962 davidsky's Photos 2005 ION-1 Sedan	Re: Radiator Fan Only Works on High Speed Totally missed the radiator fan part, sorry about that. Mine is real loud as well but I'm too lazy/poor to have a look at it. ... Member of the Crank Window Club

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