I have a 2002 Z06 with the digital climate control. This past week the blower fan didn't work after starting the car. The display on the dash is working fine, and I can hear the AC compressor kick in and out as I turn the AC on and off, and as I change the temp settings I can hear the actuators in the dash moving like normal. So I'm guessing the dash control is working as it should.

I checked the blower fuse and it is fine. Checked and reseated the connectors to the controller and blower under the dash and no change. Got out the multimeter and checked the voltage at the motor connector (coming from the controller). With the HVAC turned off I get 0 volts. With the HVAC on and the fan low (1 bar on the display) I get 12.5 volts. With the HVAC on and the fan on max (all 7 bars on the display) I get 12.3 volts. Does this sound normal for what the controller should be sending to the motor? I checked it several times and that was the result each time.

My next step is bench testing the blower motor to see if it works out of the car. I can't quite contort myself to get power on it when it is installed.

I may also try to pull out the controller to check it, but I can only seem to get to two of the screws. The third seems be be buried somewhere. Also, with the voltage going to the motor connector, maybe the controller is fine?

Is there anything else I should check as I'm poking around under the dash?

Thanks

 

had same prob....stood on my head and took the blower out.. cleaned up all the connections.. there was a little debris iin the hamster cage, but not much of anything. stood on my head again and put it back and and worked perfect ever since.. I don t u se the ac unless it is very hot and in a stand still. ima windows down kinda guy..

 

I think that will be the plan. Testing and making sure no stupid issues. It worked that morning on the way to work, then didn't turn on after work. Out of the blue, no indications or warnings of an issue.

I typically am a windows open kind of guy also. But somedays it is nice to get the AC going - like if I'm going to work or it is gross out. Also once the fall comes, I want to be able to get some heat blowing too.

 

Okay, braved the gross humid weather and got into it. Pulled out the blower motor. Looked inside the hole on the side where the hose plugs in and it was loaded with crud - probably 18 years worth. So I picked out the debris with needlenose pliers and blew it out with compressed air until no more came out.

Then I cleaned off the brushes and the contacts on the armature with electronics cleaner. Put some oil into the bearing at the end, and blew it all out again for good measure.

Hooked it up to a power supply and it spun right up. Put it back into the car and tested it out and looks to be working normally.

So if you are having a similar problem, before you tear everything apart, or start buying parts, take a good look inside the motor. I was quite surprised how much crud was in there. Hopefully this will help someone out there save some time, effort and money.

 

How much trouble is it to remove motor?

 

great job dood73

 

The hardest part of removing the motor is being a contortionist to get yourself hanging out the door on your back with your head under the dashboard and also wedged in by the passenger seat. The panels and trim pieces to remove are very easy to get out. Essentially you are removing the same stuff you would do to get to the interior fuse box.

The motor is only held in by three torx screws and then it basically falls out. To get one of them you have to pop off a small plastic footwell vent piece. There is one power connector to remove, and a rubber hose to take off the side. It was in that hole from the rubber hose where I extracted all the built up crud.