Radiator fan not working

ROOKIE2021

MEMBER
2006 CHRYSLER TOWN AND COUNTRY
3.3L
6 CYL
2WD
200,000 MILES

I have a friend who asks me to fix the radiator fan on her van. I was told the vehicle had the radiator replaced after hitting a deer 8 months prior and that the vehicle was overheating at low speeds and while idling. So after inspecting the vehicle I noticed that the reservoir was completely out of fluid, I noticed a small amount of fluid close to the water pump. The water pump was fine and it turned out to be a hose clamp that was loose that was the cause of the coolant leak. I fixed the clamp and put fluid in. I also tested fan motors and the both work. My question is, at what point will the fan be censored to turn on? Will the fan even operate it operate at normal temperature. Any advice is appreciated. Thank you. In the meantime I will be testing the relay.

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

The first thing I would do is check the coolant sensor. I would remove the connector with the key in the on position and see if the fans kick on.

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

I attached a wiring diagram for you. We need to check the relay for power from the fuse block and the module.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy

ENGINE COOLANT TEMPERATURE SENSOR

REMOVAL

WARNING: Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.

1. Drain cooling system below engine coolant temperature sensor level.

Fig. 12 POWER STEERING FLUID RESERVOIR
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2. Remove power steering reservoir and relocate (Fig. 12). Do not disconnect hoses.

Fig. 13 Fuel Rail, Ignition Coil and Bracket
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3. Remove ignition coil and bracket (Fig. 13).

Fig. 14 Engine Coolant Temperature Sensor
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4. Disconnect coolant sensor electrical connector (Fig. 14).
5. Remove coolant sensor (Fig. 14).

INSTALLATION
1. Install engine coolant temperature sensor (Fig. 14). Tighten sensor to 7 Nm (60 inch lbs.).
2. Connect electrical connector to sensor (Fig. 14).
3. Install ignition coil bracket (Fig. 13).
4. Install ignition coil (Fig. 13).
5. Install power steering reservoir (Fig. 12).
6. Fill cooling system.

Images (Click to make bigger)