Whenyou say fluctuate do you mean the fan speed is fluctuating?
Don't think fan speed increases as the bar indicator remains steady on 3 bars, but it sounds
as if it does increase. Fan is free rotating by hand and not binding.
Can I have the last 7 digits of your VIN #
Your problem is caused by the blower motor Final Stage Transistor pack and it will need to be replaced. This is an extremly common problem and the new part has been updated. It is item # XXXXX in the diagram below.
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Thank you very much,
I will always leave positive feedback all I ask is for the same.