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Jared D
Jared D, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 1810
Experience:  Shop Supervisor at County Fleet
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Overheating fans not working, yes, 2006 dts, no monday going

Customer Question

overheating fans not working
JA: Have you checked the coolant? Have you checked for a leak in the cooling system?
Customer: yes
JA: What is the model/year of your Cadillac?
Customer: 2006 dts
JA: Are you fixing your DTS yourself? What have you tried so far?
Customer: no monday going in to check
JA: Anything else you want the mechanic to know before I connect you?
Customer: is there anything i can do
Submitted: 9 months ago.
Category: Cadillac
Expert:  Jared D replied 9 months ago.

The fans don't seem to be working at all right? Not even with the AC on? Turning the AC on on this car is supposed to make the fans run regardless of engine temperature.

Customer: replied 9 months ago.
checking right now
Customer: replied 9 months ago.
fans came on
Expert:  Jared D replied 9 months ago.

In that case the problem is either in the sensor that tells the cooling fans when to turn on (engine coolant temperature sensor) or there is a restriction in the cooling system that is not allowing the hot coolant to reach the temp sensor. That could be a stuck closed thermostat, a bad water pump, or an air pocket in the cooling system. Have you checked the coolant level recently?

Customer: replied 9 months ago.
Expert:  Jared D replied 9 months ago.

You might check the OXY PST fuse as well. Sometimes it will blow and affect the fan operation. It is located in the under-hood fuse box.

Expert:  Jared D replied 9 months ago.

Please let me know if you need additional info.

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Customer: replied 8 months ago.
fuse box under back seat cannot get it open