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Radiator fan/coast to fix - 2002 Buick Century

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An hour or two labor cost plus the cost of a new fan motor, and the shop's mark-up for the fan motor. If diagnosing of the fan circuit is called for, expect to pay more.
Save the labor costs and price of new motor by doing it yourself with a whole fan assembly from a salvage yard. Very easy to remove and replace. However, if it is not the motor at fault but a circuit fault, you will have to diagnose or pay for diagnostics, but with a known good fan motor, would be considerably less. The computer energizes the radiator fan relay to shoot power to the fan motor when needed.

Posted on Jul 16, 2013

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Radiator fan/coast to fix


Depends on the area you live in. The fan motor is around $30 and the entire assembly with both fans is over $250. Then you add on labor for your area.

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1. Check the coolant level if you have not already.

2. The most likely cause is a stuck thermostat so that when the engine is getting up to operating temp the thermostat is not opening at all - or enough - for the coolant to flow freely between the radiator and the engine to cool the heated fluid. If you check the radiator after driving and find it is cold it is a sure sign that the heated coolant that is circulating through the engine at operating temp and higher is not getting to the radiator. The first thing I would do is to change the thermostat and re-check. At the same time completely flush the coolant and replace it with new fluid of the correct spec.

The radiator fans are not going to operate when the fluid in the radiator is cold because the hot fluid cannot flow through from the engine. The fans have a temperature sensor switch.

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Radiator installation on 2003 Kia Sorento


That is a VERY easy radiator.
Loosen radiator drain plug and drain coolant from radiator.
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My car is overheating


Hello, You did not indicate what vehicle this is. But in general, most cars have 2 water sensors. One makes the dash gauge work and the other makes the Electric radiator fan work. Check with a good Autoparts store like Autozone, Oreilys, or Advance for parts application. These stores will also scan your vehicle for free.
When you have an Electric cooling fan there are usually 2 speeds on them. When the engine is really hot(Overheating) and when the A/C is switched on, most will run on High speed. You can sometimes have only low speed and the car will be Okay until you get in slow traffic or use the A/C. There are Relays for the fan which turn on when the water sensor(remember there are usually two)activates them.
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Finally, clogged Catalytic converters can cause your problem. Your engine can build up heat because of them, but usually some kind of "Check" light will activate telling you something is wrong.

When you post a problem, remember to give the type of car you have.

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Change your thermostate also because this could be the cause of why it is overheating. it is not unusual for thermostates to go out. and it will only coast you around 10 usd to replace if you do it your self. and also check to see if your engine fans are working you can do this by starting the car and turning on the air conditioning. when you turn on the a/c the fans should run. hope this helps you out
please rate me if you would
thank you
Aaron

May 22, 2009 | 1990 Subaru Legacy

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