Electric Fan Problem?

[gmartin1215]

Hi,

I have an 09 LT that has the factory electric radiator fans. Recently, I have been hearing the fan kick on even though the engine is cold, like just starting for the day. Normally, I don't hear this fan unless its a hot day and I have been idling a lot. So, I am thinking something may be at fault. normal operating temperature has been sticking around 200 deg.

What are some probable causes for this symptons and what diagnostics would you suggest to determine if there is a problem?

---------- Post added at 01:45 PM ---------- Previous post was at 12:39 PM ----------

just adding more info

It is the high cooling fan that comes on. It does it at startup, then shuts down,. And t does it while driving, on off. So, its not constantly on, just off and on. if its running when I turn off the engine, it runs for a short bit longer then shuts off

 

[GM Customer Service]

gmartin1215,

I am sorry to learn that you are experiencing an issue with your vehicle. I am not equipped to give any technical advice but I am happy to assist if you have any general questions or concerns. Please private message if I can be of any assistance.

Regards,

Jennifer T.
GM Customer Care

 

[gmartin1215]

no offense, but if you don't have any useful information to share, then please refrain from posting a reply.

 

[livingez_123]

is your defroster on?

 

[gmartin1215]

the defroster was not on. However, I noticed that this issue does not occur if I have the cabin fan turned off (heater fan controls in side the Tahoe - I have the controler that has the two big knobs and the temperature adjustment has wheels, too)

Will play around with the controller some more to see when that hi coolant fan kicks on

 

[Yukon_Joey]

Any luck finding out what was happening? I've started noticing the same thing with my 2008.

Sent from my Nexus 5 using Tapatalk

 

[livingez_123]

if your controls are set on recirc, the ac will cycle and the fans come on accordingly.

 

[Yukon_Joey]

Maybe I'm missing it but what does that AC have to do with the RADIATOR fans?

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[harveje]

anytime the ac or sometimes defrost is on the computer commands the fans on high and as the compressor cycles so does the fan(s). when engine is hot and ac is on fans are running wide open.

 

[Yukon_Joey]

Ahh...I was thinking maybe you were confusing the radiator fans and blower motor/fan....but I wasn't thinking it through...The AC condenser needs air flow as well....

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[harveje]

I "think" if you have auto climate control the blower fan will change speeds depending on set and actual temp of cabin

 

[Yukon_Joey]

Makes sense, the times I've noticed it was when using remote start which sets the AC to auto and probably recirculate.

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[BacknBlack]

My 2007 Yukon XL has this issue too. Fans kick on when the engine is not hot, but outside temps are warm. I try to turn the entire cooling system off, and will still have the fans roaring. Quite annoying. I do not have the issue in winter.
My thought was maybe engine thermostat control issue? Engine does not get hot.
Like I said, the fans will just roar unnecessarily.

 

[Yukon_Joey]

I'm not quite sure what's going on...today I watched my engine temp gage jump from cold to a 1/4 of the way up the gauge (not sure what temps those are off the top of my head).....

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[harbison]

I'm not quite sure what's going on...today I watched my engine temp gage jump from cold to a 1/4 of the way up the gauge (not sure what temps those are off the top of my head).....

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gmartin1215,
Did you ever resolve the fan issue? My '09 seems to be having the same issue with high fan. I've owned it since new so I know it's sounds. High fan seems louder than normal. It does run more when A/C is on. Wondering if fan motor needs to be replaced