Blower blows harder upon acceleration (Recirculating/feet)

Jan 24, 2008 4 Replies
C

My 2006 XLE, just got it, I have the heat turned on to recirculate, on my feet.



When I accelerate, the blower speeds up, and when I slow down, the blower slows down.



This is quite annoying in the city with stop and go traffic...no consistency.



The mechanic where I bought my car is trying to convince me that this is normal. I didn't notice it until AFTER they installed my remote start/alarm.



Can anyone give me any backup to convince them otherwise, or backup to convince me that is normal?



if it isn't normal, what words/phrases do I need to drop to get them to look at it deeper?


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N

The blower is a DC motor, whose speed is proportional to the voltage applied to its terminals. The output of your DC generator (alternator) is a function of RPM; the faster the engine turns the higher the voltage. There will be some variation in blower speed, but excessive variation can indicate a problem with the generator's regulation circuit, or with the battery.

BigJim wrote:

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R

Maybe a bad battery, bad connections, weak alternator.

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J

If you turned on AC, head lights, radio, and other electrical components then the light will dim and brighten a bit especially during idle. It's because you're using more juice than the alt/batt can provide.

Have it checked under warranty. That's what warranty is for.

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