Question about 2003 Buick Century

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The 2 lower speeds for my blower quit working. I read on here that this means the resistor block is burnt out. I replaced the resistor block, but after about 1/2 hour of driving the blower quit again. I looked at the resistors and saw a burn mark. So I got a 2nd set and plugged them in but just left the resistors hanging under the dash. After a couple of minutes the resistors were so hot I could not touch them. Should they be this hot? Does this indicate another problem? If so, what else could be wrong?

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This shouldnt be normal. you are getting to much power (amperage) to the resister unit. ide check the see which terminal going into ur reisister pack is sending all that power and trace it back

Posted on Jun 18, 2009

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1 Answer

Low speed fan doesn't work


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How to replace the blower motor resistor block: Caution: Stay clear of the blower motor and resistor block (Hot). Do not operate the blower motor with the resistor block removed. 1. Disconnect and isolate the battery negative cable.
2. Remove the glove box from the instrument panel.
3. Pull out the lock on the blower motor resistor wire harness connector to unlock the connector latch.
4. Depress the latch on the blower motor resistor wire harness connector and disconnect the connector from the resistor.
5. Remove the two screws that secure the blower motor resistor block to the HVAC housing.
6. Remove the resistor block from the HVAC housing. Installation:
1. Position the blower motor resistor block into the HVAC housing.
2. Install the two screws that secure the resistor block to the HVAC housing. Tighten the screws to 2.2 Nm (20 in. lbs.)
3. Connect the wire harness connector to the resistor block.
4. Push in the lock on the blower motor resistor wire harness connecgtor to lock the connector latch.
5. Install the glove box.
6. Reconnect the battery negative cable.
7. Have a nice day!

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ITS THE SPEED RESISTENS THAT HAS BURNED,THE FAN HAS ONLY ONE SPEED , AND THE RESISTENS LOWER THE SPEED IN STEPS , GET A NEW ONE AND IT SHOULD WORK

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The blower resistors are the most common cause when it comes to the problem your describing however there could be other causes. It could be a bad speed switch or the wiring between the switch and resistors.

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