Question about 2003 Buick Century

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2003 biuck century heater and defroster not working

No heat and no fan

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Heater is dead

My 2000 century heater blower died,dont replace the fan motor until you check with a simple test light to see if the heater fan resistor is bad first,it's only 20 bucks to replace.Its located next to the fan housing up against the firewall.The wires from the fan switch go down to the resistor, check to see if switch has power then check for power down at the resistor,I'll bet its the resistor.There are three, I think five sixteenth screws to remove the resistor one is crammed up very tight on the firewall,you'll need a quarter inch drive extension with a wobbly socket to get that one against the firewall.

Posted on Dec 16, 2008

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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

  • 3 Answers

SOURCE: 1986 buick lasabre heater fan workes, but no heat at all

could be a vacuum switch on the heater hose. The heater hoses are the small hoses ( 1inch, usually black or red) that run from the motor to the inside of the car. They should be warm when the car is up to temperature.

The vac switch controls the water flow to the heater core. If the vac valve is bad or the vac line that feeds it is bad it will not allow water to enter the heater core.

Could be a plugged heater core too.

Check the water level in the radiator as well. If the engine is low on water often the first to go is the heater.

Posted on Dec 20, 2008

cbcs2008
  • 46 Answers

SOURCE: Heater blows cold air

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

Posted on Jan 19, 2009

  • 3 Answers

SOURCE: 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.

Posted on Apr 05, 2009

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If Compressor is bad and you want to use the heater and DeFroster just unplug the Compressor wire from the compressor and you ought to be able to use the Heater & Defroster .

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is your heater set on defrost this will cause your engine fan to run because it turns on the compressor for air conditioner this helps to extract moisture from your warm air defrost  and the fan in the engine compartment helps keep it the engine cool from the extra load on the engine this is normal 

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

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Since the fan is electrically operated it is not the problem.it seems like more of a waterflow problem:the faster the engine turns-the more the water pump turns.i am only guessing but it seems like it could be low on antifreeze or your water pump is failing..good luck

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My 2001 BMW 325I Heater fan comes on when heat or air is off.


From your discription I feel like it is only the resistor that is at fault.

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Does your blower fan work on your heater/ac or your rear defrost work it could be the igniton switch were you put the key in. Turn the car on and off several times once you notice the cruise will not work and see if it starts to work if it does than it is the ignition switch this just happen to my 2003 century.

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