Depending on the year of the Buick Century it may have vacuum controlled heater blend doors. These use engine vacuum to move the doors that control where the heat is directed.
If one of the vacuum lines has a hole in it, it would cause the engine to run unevenly due to the vacuum leak.
Check the vacuum lines and listen for air leaks. You can also try spraying the vacuum lines with *small amounts* of carb cleaner, if the engine idle goes up when you spray a particular spot there is a vacuum leak there.
On March 26, 2008, Probably Tommorow.
The heater control valve on a 1989 Buick Electra Park Avenue with a 3.8 engine is typically located near the firewall on the passenger side of the engine bay. It is connected to the heater hoses that run from the engine to the heater core. The valve itself may be mounted on the engine or on the firewall and is usually accessible from the top of the engine compartment.
In my Buick? Not a thing. Need more info on what your Buick is doing or not doing --- cooling system problem? In dash heater problem? Engine overheating?
The heater fuse on a 2000 Buick Century is located on the right side of the engine compartment, in a water tight box. It houses many of the major fuses for the vehicle's electrical system.
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no
depends what type of engine you have, on a 3.3L you have to remove the steering pump before you will be able to completely remove the blower motor; on the 3.1L you have to remove the alternator before replacing the blower motor
To change the heater core in a 1993 Buick LeSabre, start by disconnecting the battery and draining the cooling system. Remove the dashboard and the center console to access the heater core housing. Disconnect the heater core hoses from the engine compartment, then unbolt and remove the heater core from the housing. Install the new heater core, reassemble everything, and refill the cooling system.