Question about 2003 Buick Century

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Why wont the heater in my 2003 buick century work

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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dgjtex
  • 405 Answers

SOURCE: Heater/AC Fan does not work in our 1998 Buick Century

Fan will be under dash on passengers side , Removing glove box might be needed, Gm also uses a blower resister ro control fan speeds. First check your fuse and then check and make sure your getting 12 volts to the terminal at the blower, You could have a blown fuse, a bad switch, or a bad resister , if your getting voltage to blower motor then most likely it will be the motor. These are not to difficult to change. I hope this helps, please be aware I can only guess at what the problem is from my past experience.

Posted on Dec 18, 2008

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  • 3 Answers

SOURCE: heater blowing cold air Buick Century 2000

does the car not heat up in general? Whats the temp gauge doing and how long of a ride have you tried this for?

Posted on Jan 06, 2009

ramonvelasqu
  • 24 Answers

SOURCE: Where is the radiator drain plug on 2003 Buick Century?

just pull out the holes.

Posted on Jan 17, 2009

johnsmith992
  • 37 Answers

SOURCE: replace heater core in a 2000 buick century

please do not tamper wid the aircon as the system is pressure filled with co"2 liquid gas.

Posted on Jan 29, 2009

  • 176 Answers

SOURCE: need unlock code for 2003 buick century car radio

You will need to take the car to a dealership to have the service department unlock the radio for you. They have a special code to unlock the radio and then you are required to change the code to one that you will remember. An appointment should not be needed because this takes about 5 minutes. I do not remember the code, sorry.

Posted on May 18, 2009

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Rose, Can you hear the fuel pump 'buzz' for a few seconds when you turn the key to the 'on' position? Is so. and I know this sounds crazy, but try turning your heater fan switch all the way to the high position and then try cranking it. Another Buick Century owner told about this in another forum and it works for him and others. Apparently there is a fault in the computer and the electrical current draw from the heater fan has a positive effect on it. It's worth a try. If this works for you please post on this site so that others may benefit. Thanks

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I had the same problem on my 2003 regal,
I looked under the seat, and i noticed that the electrical wiring harness for the seat had caught on something . The wires had just streched so far that they all broke...all i had to do was splice them back together and presto..it worked.


check that 1st..

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2003 buick century. heater does not work. gauge shows warm-up, but slow. system level not low. best guess as to cause?


i would think your engine coolant thermostat is stuck open or faulty and needs to be replaced, inexpensive.

Oct 27, 2009 | 2003 Buick Century

1 Answer

Heater on 2003 Buick Century only works when the rpms are up


Your likely problem is low coolant level. Check to make certain that your coolant level is topped up in the radiator and that coolant is also in the reservoir at the appropraite level as shown when on container when the engine is hot or cold. When the coolant is low, you have to have higher RPMs to get the coolant to pump through the system and heater core.

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check the coolant level on your radiator

Feb 03, 2009 | 2003 Buick Century

1 Answer

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Replace the fan control module.

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1 Answer

Heater blows cold air


is it wet on the pass side floor ??? your heater core is out.. hard to replace...

Jan 19, 2009 | 2003 Buick Century

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