Blower motor wont turn off

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Jalopy

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manteca california
First Name
joe
Truck Year
1973
Truck Model
k10
Engine Size
383 stroker
It won't turn off, anyone know why?
 

Rickf

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Grafton NH
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Rick
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1974, 1954 & a 1937
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K20
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350
Some year squares are always on low. Is "off" missing from the heater/defroster control?
 

75gmck25

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Bruce
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1975
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K25 Camper Special TH350 NP203
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5.7
Many GM vehicles have a blower motor that runs any time the ignition is on. For our trucks it varies by year, but I know it is continuous-run on my ‘75.
 

Snoots

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Georgia
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Roger
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1973
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Jimmy Sierra
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350
If you're talking about your '73, the blower always runs on LOW. It's part of the ventilation system.
 

Bextreme04

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Oregon
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Eric
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1980
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K25
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350-4bbl
Any square 1980 and earlier will not have an "off" setting for the blower. It will always run at least a little bit.
 

gotyourgoat

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gotyourgoat
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1984
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c10
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smokin' 305
Any square 1980 and earlier will not have an "off" setting for the blower. It will always run at least a little bit.
Used to have a scan of an old GM advertisement touting this feature, since lost to a broken phone. They called it their constant cabin ventilation or something similar. It was across many if not all models, not just trucks.
I've heard a few times it was because of a lawsuit gm lost where some people died of asphyxia while sitting in running parked vehicles. Maybe Gm scrubbed this from the interwebs because I cannot seem to confirm that is indeed what brought constant cabin ventilation into our lives.


You could always just pull the one plug out of the heater box and make it always off. ;)
 

AuroraGirl

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Northern Wisconsin
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Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
You must be registered for see images attach

I think the complicated "air" system this car had makes sense now with that blower motor thing running all the time, there is the valves under dash on the left and the upper switch on the left and the heater stack says off, but its a 75 so maybe that was there way around it
 

AuroraGirl

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Engine Size
400(?), 350
1980 ad (not disputing terry just found thread in notifications )
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