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Ask Jared D Your Own Question
Jared D
Jared D, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 1334
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: 15 days ago.
Category: Cadillac
Expert:  Jared D replied 15 days 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 15 days ago.
checking right now
Customer: replied 15 days ago.
fans came on
Expert:  Jared D replied 15 days 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 15 days ago.
Expert:  Jared D replied 15 days 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 11 days ago.

Please let me know if you need additional info.

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Customer: replied 10 days ago.
fuse box under back seat cannot get it open

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