Originally Posted by oceanbrave

Blower motor controller died again, the fan kept running a maximum speed if with the ignition off and the HVAC off, quite worrying really. This time it was the Power MOSFET dead short (brown out) its now be replaced and all is working again.

Please note that the unit is NOT a resistor pack, at least not on the 2005 H2, not sure where this terminology came from?

I've reversed engineered the entire design, only 1 datasheet eludes me the AA539B 20 pin SOP device, if anyone has it it would be useful.

Most of us in the group will have issues with this unit at some stage so I can help save you the cost of a replacement, replacing the MOSFET is quite easy really and very cheap, not more than a few dollars.

Hope members find this helpful....