Question about 1998 Buick LeSabre
2003 Buick Century. My blower motor resistor failed. Only had fan high (5). Replaced resistor pack. Yes it was a pain but doable. The next day the problem returned. Fan speed 1-4 not functioning AGAIN!!! $48 shot down the drain. Also noted that the vent selection switch not working, unable to select between defrost, floor, blend etc. Air blowing from defrost and vents at same time. Is there something that could be causing the blower motor resistor pack to be shorted out causing speed control 1-4 to fail??? I dont wont to buy another resistor pack only to have it fail again. Thanks for all the help. I have identical problem with 98 Buick LeSabre / with Digital dual climate controls. Blower motor only seems to work on Windshield defrost setting. Pse advise Corsow1557
The hvac selector switch in the dash may be the problem.You need to remove the switch and look at the connector on the back of switch,see if there are any burnt wires at the connector or switch.It's all electronic and the switches have been known to burn out on this and other model.
Posted on May 26, 2009
Get a manual at autoparts stor or library might have it check heating and cooling . Where the air comes out by the floor board in the center part of the car air box there are. Springs and stuff that break and fall off or just get stuck ,the manual will help wit ur colored hoses
Posted on Jul 15, 2014
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Posted on Jan 02, 2017
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Mar 05, 2011 | 2003 Buick Century
Blower Motor not working for all speeds or not at all.
What does it take to get air to come out the vents?
1. Power from the battery or alternator, wiring thru a fuse and possibly an accessory relay to the switch
2. Switch and wiring to channel voltage to the appropriate resistor corresponding to the desired speed
3. Resistor set to reduce voltage to the blower for settings less than high
4. Final wiring to blower and blower itself
Because there is usually no relay between the switch and the resistor, all of the blower current runs through the switch. This sometimes causes the switch to overheat and fail over time. Depending on how the switch is designed, the failure may allow multiple currents to run to the resistor pack, and this may in turn cause the resistor pack to overheat and fail. An example of the circuit I'm describing is shown below:
Note that if the above switch was to contact both terminals 2 and 3 simultaneously, there would be more current than the resistor pack is designed for. This can burn the resistors and/or blow the thermal breaker. Also note that if the resistor pack fails, the blower can still run at full speed.
Troubleshooting: The last sentence above is a clue.
If your blower is working only on high speed, the likely cause is a failed resistor pack. However, because of the other discussion above, you should also troubleshoot the switch to see if it is the reason the resistor pack failed.
If the blower does not work at all, odds are that the problem is the fuse, relay, or the motor itself.
Repair: The resistor pack is installed in the air stream of the system to help cool the resistors. It is usually accessible from under the dash on the passenger's side or sometimes from the engine compartment along the firewall. It is identifiable by the connector with several wires coming out-some going to the switch and some to the blower motor. The resistor is replaced by unscrewing it from the duct and reinstalling the new resistor pack.
The blower is usually accessible from above the passenger
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