Why wont my HVAC blower motor shut off, even though the key is out of the ignition?

what sub model accord, v6 LX ,
manual or full climate control option??? guess full.
fuses not checked PCM scanned for DTC errors EVAC, hopeless/?
so car starts and runs sand drives ok, <<< not told that.
yes the AC brain on most modern cars is BCM brain controls
and the brain does control the AC compressor. if that is dead so be AC, THE COMPRESSOR CLUTCH, is run by PCM RELAY.
NOT TOLD OUTSIDE TEMPERATURE NOR COUNTRY../
HERE IS A LIST.
1: CHECK ALL FUSES FIRST, CAB AND ENGINE BAY ALL FUSE BOXES SKIP NONE.
2: CHECK IP CLUSTER FOR ERRORS ,ALARMS ERRORS OR LAMPS GLOWING OR IMMO LAMP SHOWS IMMO IS UNHAPPY, MODE.
3: ENGINE STARTS AND RUNS AND CAR DRIVES.?????????
4: HEAD LAMPS WORK KEY ON AND OFF. ,
5: OTHER ELECTRIC FAILURES OR JUST THE BLOWER ONLY?
6: SCAN THE pcM FOR ERRORS, AC IS CUT DEAD EVEN FOR ENGINE OVERHEATING OR OVERLOADED !!! OR IN LIMP MODE/
yah can't fix modern cars lacking a scan tool, no way./

bLOWER FACTS
PER THE SM BOOK REAL

THERE IS A BLOWER RELAY AND SOME FUSES. 12VDC SIDE.
FUSE 30 DASH
AND 21 HOOD, BOTH MUST BE GOOD. and fuse 12 V6
THE bLOWER gets GROUND FROM THIS
Audio-HVAC--Display Panel
l AND ITS BLOW POWER TRANSISTOR MODULE
SO WE KNOW THE TRANSISTOR IS off. IS CAUSE 1.
ONLY WHY REMAINS!!!!
YES THE CONTROLLER DOES NOT WANT TO RUN ANY DEAD BLOWER AND RISK ICE DAMAGE TO THE EVAP CORE.

THE Audio-HVAC Display Panel, READS MOTOR SPEED ACTUAL. speed (a kind blower tachometer wire)
IF SAY A INSECTS NEST JAMMED UP THE BLOWER FAN
THE AUDIO -HVAC, MODULE SEE THAT AND CUTS AC DEAD BY DESIGN AND HARD GOOD REASons/
the THE Audio-HVAC , has the ICE up sensor and monitors R134a
high/low switch and if wrong, tells the PCM to shut down its
Clutch solenoid to compressor ending all AC .
I am no sure what blower does.
but I can say this tell of blower works in heat mode or blower + no AC no HEAT mode. yes then the blower is not bad, nor the controller
what is wring is inputs to the controller are dead wrong
and not scanning the PCM after fuses is why you don't know.

l;earn now this works
Audio-HVAC
Display
Module
https://eautorepair.net/Marketing/Default.asp



not checking fuses first then scanning the PCm is why answers simple are not found.

like these and scads more.

Trouble Code: HVAC 12 (3.0L V6 VIN - Std)
A Problem in the Blower Motor Circuit

Trouble Code: HVAC 13 (3.0L V6 VIN - Std)
HVAC Control Unit Internal Error


Trouble Code: HVAC 14 (3.0L V6 VIN - Std)
An Open in the Evaporator Temperature Sensor Circuit (ICE Up preventions)

Trouble Code: HVAC 15 (3.0L V6 VIN - Std)
A Short in the Evaporator Temperature Sensor Circuit(ICE UP)

The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.

HVAC Blower Controls Circuit Description
The blower motor is a variable speed motor. The motor operates at a higher rate when voltage is increased to the maximum level.
The blower motor resistors reduce the voltage supplied from the A/C FAN fuse (LH IP Accessory Wiring Junction Block) when the blower control is set at low and medium speeds (speeds 1-4). The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.

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www.dieselplace.com/.../76.../208669-blower-motor-wont-shut-off.html

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I have read through many posts on blower motor issues but no one had the same issue I have. ... If I shut the truck off, it still won't shut off and runs until the battery is dead.... 2002 GMC Sierra RCLB 1500 4X4 SLE, 7 1/2' Fisher plow.

Question - Blower Motor Won't shut off ' Chevy Truck Forum ' GMC ...

www.gmfullsize.com > General > Maintenance

Did you try the dimmer control on the headlamp switch, rotate one way or the other, see if interior lamps return. Checking applicable fuses is good, but, you also need to check voltage on fuse circuit, use a test lite.
As far as your blower motor, pull the hvac blower fuse in underhood fuse block, that should kill the blower motor till you figure out the problem. Could be a problem with blower motor control processor. I can't be positive?

No it wont. You will want a blower motor from a 2004-2011 chevy impala, 2004-2007 monte carlo, 2004-2008 pontiac grand prix or 2005-2009 buick lacrosse.

read this post on what's causing blower motor to run all the time.

http://ricksfreeautorepairadvice.com/blower-motor-wont-shut-off/
Blower motor wont shut off Ricks Free Auto Repair Advice

Your impala doesn't have a resistor , it has a blower motor control processor and it doesn't work the way you think it does
Chevy Trailblazer EXT Blower Motor Won Turn Off
Blower Motor Control Processor
The blower motor control processor is an interface between the HVAC control module and the blower motor. The blower motor speed control, battery positive voltage and ground circuits enable the control processor to operate. The HVAC control module provides a PWM signal to the control processor in order to command the blower motor speed. The processor supplies 12 volts to the blower motor through the blower motor voltage supply circuit. The control processor uses the blower motor ground as a low side control to adjust the blower motor speed.

HVAC Blower Motor Circuit

the swicth is bad in dash were the swicth goses off and 1 though 4 or 5

You have to have the key coded with the ignition switch at a lock smith,or the dealer.

The purple wire voltage, black wire is ground, at the blower motor. At the blower motor control processor, the red wire is a fuse protected circuit, hot all the time. With hvac off, if nothing on the speed control circuit, doesn't the problem have to be the control processor? Do you see it differently? Just my opinion.