auxilary fan always runs

Burt Ragio

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Shortly after warm up my auxilary fan starts to run & switch back & forth between the two speeds. The motor does not over heat. I never remember the auxilary fan always running so much. Almost acts like coolant is low. I have checked coolant level & it seems ok. This happens with nothing on no A/C no defrost no heat. Outside air temps have been around 50-60 degrees. What should I check ?
 

fastblackmerc

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Shortly after warm up my auxilary fan starts to run & switch back & forth between the two speeds. The motor does not over heat. I never remember the auxilary fan always running so much. Almost acts like coolant is low. I have checked coolant level & it seems ok. This happens with nothing on no A/C no defrost no heat. Outside air temps have been around 50-60 degrees. What should I check ?
Auxiliary fan? If you mean the radiator fan, the first thing I'd do is burp the cooling system.
 

Zack

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You wont have a difinitive answer until you hook a scanner up and read actual coolant temps.
Is the air being pushed by the fan cool or hot?
 

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