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Old May 6, 2015 | 12:19 PM
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Default blower motor

I was watching my gutters being cleaned and blower motor started and run about 15 seconds a few minute's later done it again. I unlocked doors and pulled the fuse. ?? 2000 C5. any ideas. ???
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Old May 6, 2015 | 01:27 PM
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Originally Posted by billc80
I was watching my gutters being cleaned and blower motor started and run about 15 seconds a few minute's later done it again. I unlocked doors and pulled the fuse. ?? 2000 C5. any ideas. ???
The car was not running and the key turned off?
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Old May 6, 2015 | 01:41 PM
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Default blower

Originally Posted by JR-01
The car was not running and the key turned off?
yes, had not drove it for a few days. 2 weeks ago I drove it 400 miles to OK. and back, run like a champ, gas mileage 30.3
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Old May 6, 2015 | 01:50 PM
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This is a good one. I hope someone has an idea.
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Old May 6, 2015 | 01:54 PM
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"Blower motor"...radiator fan or AC/heater?
(Or is there another blower motor I don't know about?)
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Old May 6, 2015 | 03:30 PM
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Default blower

Originally Posted by Lee DeRaud
"Blower motor"...radiator fan or AC/heater?
(Or is there another blower motor I don't know about?)
A/C-heater
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Old May 6, 2015 | 03:33 PM
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While you were watching the gutters being cleaned were you drinking any alcoholic beverages?
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Old May 6, 2015 | 03:48 PM
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Follow-up question: "gutters being cleaned"...I assume you're not talking about rain gutters on your house, but something on the car.
Was water getting sprayed around the cowl area?
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Old May 6, 2015 | 03:57 PM
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Default blower

Originally Posted by Lee DeRaud
Follow-up question: "gutters being cleaned"...I assume you're not talking about rain gutters on your house, but something on the car.
Was water getting sprayed around the cowl area?
house gutters. I can't drink at all. Damn it.
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Old May 6, 2015 | 04:51 PM
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Originally Posted by billc80
house gutters. I can't drink at all. Damn it.
So basically the car was just sitting there undisturbed and the AC blower went on.
I'm thinking some wiring around the fan motor got shorted to ground as a result of some nearby activity. Other than that, I got nuthin'.
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Old May 6, 2015 | 05:32 PM
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Hope I am not the only one confused about what is going on in this thread? To OP suggest you re-write question in a simple manner so we can try and help you.
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Old May 6, 2015 | 05:54 PM
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Originally Posted by El original
Hope I am not the only one confused about what is going on in this thread?
Nope, pretty much everyone who has posted to it is confused, near as I can tell.
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Old May 6, 2015 | 06:15 PM
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So....the OP was outside watching someone clean the gutters on his house when the A/C blower(fan) in his parked, locked, and not running "vette came on and ran for 15 or so seconds. Then it did it again. He unlocked the car and pulled the fuse to the A/C blower to keep it from turning on by itself again. OP is that correct?
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Old May 6, 2015 | 06:19 PM
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Originally Posted by alxltd1
So....the OP was outside watching someone clean the gutters on his house when the A/C blower(fan) in his parked, locked, and not running "vette came on and ran for 15 or so seconds. Then it did it again. He unlocked the car and pulled the fuse to the A/C blower to keep it from turning on by itself again. OP is that correct?
That's what I understood happened. Were they using a leaf blower to clean gutters? The echo off a wall may have sounded like the blower on the car.

OR.........................



Last edited by JR-01; May 6, 2015 at 06:26 PM.
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Old May 6, 2015 | 09:41 PM
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This is a new one to me. Hope you find what caused the blower motor to come on with the car off.
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Old May 7, 2015 | 08:56 AM
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OK, I need to know whether you have a manual or dual control HVAC head unit.

I think it is the Blower Motor Control Processor. It is powered ALL the time so it's electronics could decide to run the motor.

Based on what system you have I have a couple of other options to consider but I think it is the Processor.

Mr. Sam
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Old May 7, 2015 | 10:32 AM
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Originally Posted by dadaroo
OK, I need to know whether you have a manual or dual control HVAC head unit.

I think it is the Blower Motor Control Processor. It is powered ALL the time so it's electronics could decide to run the motor.

Based on what system you have I have a couple of other options to consider but I think it is the Processor.

Mr. Sam
Why did GM engineers think it was a good idea to have things like that powered all the time?
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Old May 7, 2015 | 10:39 AM
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Originally Posted by dadaroo
OK, I need to know whether you have a manual or dual control HVAC head unit.

I think it is the Blower Motor Control Processor. It is powered ALL the time so it's electronics could decide to run the motor.

Based on what system you have I have a couple of other options to consider but I think it is the Processor.

Mr. Sam
Damn it Sam... it was just starting to get interesting and you have to come along with some logical explanation...
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Old May 7, 2015 | 10:49 AM
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Default blower

Originally Posted by dadaroo
OK, I need to know whether you have a manual or dual control HVAC head unit.

I think it is the Blower Motor Control Processor. It is powered ALL the time so it's electronics could decide to run the motor.

Based on what system you have I have a couple of other options to consider but I think it is the Processor.

Mr. Sam
Manual, put the fuse today seems to be ok car had not been drove for 2 or 3 days.
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Old May 7, 2015 | 11:00 AM
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Originally Posted by JR-01
Why did GM engineers think it was a good idea to have things like that powered all the time?
Good question. What it does is allow many things to be controlled without having to activate relays. If they had a relay for every circuit like this you would need two additional fuse type boxes full of relays.

Also many things are activated or turned off by a simple single wire serial bus command.

Makes perfect sense when trying to reduce the wiring and components in the car.
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