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Old 27th June 2004, 15:26   #1
sctazmon
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Heater A/C - Fan Blower - Fuse????

2000 M5

My A/C-heater fan is dead. The digital dial on the dash rises and lowers as I push the fan up and fan down buttons, but there is no air flow.

I first suspected the fuse. In the glovebox, the heater blower motor fuse is labled fuse #76, but it is nowhere to be found. The glove box has fuses 1-45, and the trunk luggage compartment near the gas filler has fuses 46-66.

Where the hell is fuse #76? It is a 40 amp fuse???

A call to the dealer didn't help me locate the fuse - but he did say it could be the "final stage" that is out?

Anyone else have their fan go out?
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Old 27th June 2004, 21:19   #2
XrayMD
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Re: Heater A/C - Fan Blower - Fuse????

76 is p[robably under the hood. Seems to me I remember an old thread about similar failures. Ah yes...here it is...the final stage resistor pack was prone to failure. Here are replacement instructions for DIY.

Thanks to Synergy:

"Ok, for those who are interested, here's a rough set of instructions. I guess I should start by making the disclaimer of try at your own risk.

The final resistor pack is located inside the center dash behind where the HVAC controls are on the passenger (right) side for those of us who drive on the right side of the road.

The main trim/cover piece that you need to get off is the one that covers the underside of the passenger side dash, behind the glove box. I'm actually not completely sure of whether or not you have to remove the trim pieces on the doorsill and the kick panel to get it off or not. Mine were already off b/c I'm doing other things to my car. You may or may not be able to get the underdash cover off without taking off those trim pieces. The under dash piece simply slides towards the rear of the vehicle. I wedged my fingers in there on the front of the piece right behind the glove box hinges and pulled really hard.

If you find you need to remove the trim panels around the door, first remove the plastic piece on the door sill. This is the plastic trim piece right next to the passenger seat. There are actually 2 trim pieces there. The one you need to remove is the one that touches the carpet, NOT the one that says M5. The trim peice pulls straight up. There are 3 plastic pins that hold it in, one on each end and one in the middle. The other one is the trim piece on the front of the door frame. It has 2 pins holding it, at the top and bottom. These pop off towards the center of the car.

The last piece to come off is the carpeted piece on the side of the center console under the dash. There is 1 screw that holds it in. After you take out the screw, this piece slides toward the back of the vehicle and then comes out.

The HVAC resistor pack is all the way up against the fire wall. You'll see 5 pretty big wires going into it. The plug has a catch on each side. To take it off, just grab the sides, pinch, and pull. Once you have the wire plug off, you need to remove the resistor pack. There is a catch holding in the bottom side of the pack, closer to the fire wall. Push this catch down so it will clear the body of the resistor pack and then just pull the resistor pack straight out towards the passenger side footwell.

The new resistor pack (part no. 64 11 6 923 204) slides right into the spot the old one came out of. There are 2 pins that need to line up as you slide it in. One is at the top corner by the firewall, one is one the bottom corner closer to the controls. The catch will clip over and hold in the resistor pack once you have it in all the way. Plug the wire plug back in.

Reassemble the trim pieces the same way they came off."
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