Heater fan won't shut off

most obvious cause could be the alternator ,one of the diodes has gone draining the battery or the battery itself its difficult to know without checking it out .Try disconnecting the battery and if it still goes flat then you know its a faulty cell in the battery .if it doesnt then try disconnecting the big thick cable on the alternator and see if that stops it

i beleive you did more than that.? you,ll probably find all have a common earth , chech and remove it , clean with a wire brush and replace, also chance the fuse you removed and replacer reguardless of it,s appearence , ensure its put back in the correct location,peter.

Lift the hood and prop it open. Makes sure the engine is cold. Disconnect the negative battery cable with a socket wrench or box wrench. Avoid using open-end wrenches on the battery terminals, as they tend to strip the bolt heads.

2Place a drain pan under the radiator. Open the radiator cap. Open the radiator drain on the bottom of the radiator and the two coolant drains near the oil pan. You can reuse the coolant unless it appears cloudy and contaminated. Close all three drain openings once all the coolant has drained from the system.

3Disconnect the inlet and outlet hoses of the heater core inside the engine compartment using a socket wrench. Be prepared to catch or wipe up any coolant that drips from these hoses. Drain the coolant from inside the heater core.

4Unscrew and remove the lower instrument panel sound insulator from below the dashboard on the passenger side. Use a socket or screwdriver to loosen and remove the screws on the heater floor outlet. Remove the clips and take out the duct.

5Loosen and remove the screws holding the heater core cover in place. Remove the cover.

6Remove the retaining bolts holding the heater core in place. Remove the heater core.

Read more: How to Replace a 1998 Buick Century Heater Core ' eHow.com http://www.ehow.com/how_7315216_replace-buick-century-heater-core.html#ixzz1ZCAFz2g4

i have a 1997 park ave and none of the windows will work i changed relays fuses checked motors changed window switches i need help

i have a 98 buick park avenue
i got a problem running it. it start but when i hit the break pedal some light comes out the direction signal and it shuts off i check all the fuse

the ac computer is on the fritz or the ac control panel has a short in it

I think you may want to have the battery looked at first. As for that noise. you may have a automatic leveling and that would be the pump kicking on and off.

You need a blower control module. It's about six inches from the blower motor on heater case.

Relace blower control module.

make sure the trunk light is going off