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Discussion Starter · #1 ·
hello everyboby just put a new radiator in my 3500.5.9-03 and my fan is not going on I can see the fan blades :hyper::hyper:rotating but dosen't engage when the tempeture heats up. Do I need to re-set something?? any help would be greatly appreciate it
 

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Did you make sure there are not any air pockets in the cooling system?

Run the truck for 10 minutes with the radiator cap off.
 

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It shouldnt take long. Just let it idle and it typically works fast.

You might need to do this a few times over a week period to make sure there are not any air pockets.

Be sure to watch the coolant level and add, if needed,
 

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Also check the plug that routes thru the fan shroud from the fan clutch and plugs in on the passenger side. Make sure that you have a good connection.
 

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If it's oveerheating and the fan is not ramping up, start there. It should sound like a plane taking off. Was it working before you replaced the radiator?
 

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make sure that the inteercooler and a/c condensor are clean they can get clogged and not let dirt through.
 
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