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Chirping heater in 99 Buick Century

I have a 99 Buick Century. Up until recently the heater would chirp from time to time, usually when I turned the wheel. Now, it's doing it all the time. I called the place I bought the vehicle from and they recommended another mechanic but to price it first as it may be the heater core which if thats the case I would be better off replacing the VEHICLE ! What could it be? Is it in fact the heater core or just the fan?

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I don't see how the heater core could play any part in making a noise like this. Not sure what a "chirp" is, but from the way you are explaining it, it is probably the fan (worn bearing), but may also be something small from outside the car which has got into the air intake and is being rubbed by the fan air mover on the fan housing.. To test, pull the fuse for the fan to see if the sound stops.

Posted on Jul 15, 2017

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I've never heard of a core making that noise. And the only reason to replace a core is if it is leaking or plugged up. Chirping wouldn't happen in either of those circumstances. It is probably the fan, although something caught inside the fan blades might also be making the noise. You are lucky that the heater fan is much easier and simpler to pull off. You should do that and see if there was something causing the chirping

Posted on Jul 15, 2017

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Posted on Jan 02, 2017

dgjtex
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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

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

emissionwiz
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SOURCE: 99 Chevy Malibu belt chirping noise problem.

one or more of the pulley's is defective, most likely the tensioner pulley, but check them all for wear and side to side movement which indicates a worn bearing, this causes the belt to not run true and chirp.

Posted on Apr 09, 2009

blubanshee
  • 48 Answers

SOURCE: heater core replacement

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You have to remove the entire front of the heater case to change thecore. This usually looks a lot easier in print than it actually IS.Theinstructions say to remove the lower part of the dash for access; usually youdon't have to remove the entire dash for this type of service, althoughsometimes it makes things easier if you loosen and remove any components notmentioned in the procedure that are in your way.
This kind of repair can be frustrating, as it involves working in tightplaces and with 1/4 drive extensions and universal sockets to get all thefasteners out, but it IS possible.Here is what I have for the factoryprocedure. I don't know of any shortcuts to make the process easier; if you can'tget it off, perhaps removing the dash completely for more room would be aviable option...


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Posted on May 27, 2009

  • 1 Answer

SOURCE: I need to replace the 99 buick century side mirror

There is a small plastic piece (triangular shape) at the top of the door panel, opposite of the mirror. It is held in place by a plastic clip. You can gently pop that out, with a flat blade screwdriver or something similar. That will expose 3 bolts with nuts on them. On my 2000 Century, they are 10 mm. Take off those three nuts, and the mirror will come off.

Posted on Jul 19, 2009

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