Question about 1994 Chevrolet Lumina APV

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My blower went out that runs the heat and ac. I had it fixed 6 months ago. Could it be a vacuum hose connection?

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No that would only be electric that runs the blower motor. If I were you I'd check out the blower resistor and connector at the resistor. They draw alot of amps througth them, and they burn out over time.
Well let me recant my first statment. If the blower is working but is not coming out of the right vents then that could be vaccume. But the way you are saying it, I think you mean that the blower is not working at all.
And also you may have gotten a cheap blower that has died again?

Posted on Jul 01, 2009

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Heat and ac won't switch from hot to cold and won't switch from defroster


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How do i replace the heater core 1997 isuzu hombre


See me at website for images can only send one through this channel. www.autorepairhelp.us

Best Regards,

Master Tech Lee

HEATER BOX SHIELD
Image
Heater Box Heat Shield
Remove or Disconnect
1. Fasteners that retain heat shield to heater box assembly.
Image [ Heater Box Heat Shield
Install or Connect
1.Fasteners that retain heat shield to heater box assembly.
Tighten
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HEATER ASSEMBLY
Image ' Heater Hoses
Image ' A/C Evaporator Tube Assembly
Image ' Evaporator Core
Image ' Evaporator Core Assembly
Image ' Heater Assembly
Remove or Disconnect
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3.Instrument panel. Refer to Instrument Panel Replacement in Interior Trim.
4.Air inlet assembly. Refer to Air Inlet Assembly Replacement.
5.Vacuum lines.
Important
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6.Heater assembly studs inside engine bay.
7.Blower motor resistor. Refer to Blower Motor Resistor.
8.Stud inside heater core housing.
-Stud is revealed by removing the blower motor resistor.
9.Rear case screws.
10.Heater assembly.
11.Seals.
Imagt
Imagt
Imagt
Imagt
Imagt
Heater Hoses
A/C Evaporator Tube Assembly
Evaporator Core
Evaporator Core Assembly
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Tighten
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8.Air inlet assembly. Refer to Air Inlet Assembly Replacement.
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Auto Repair Help US 699e5693-1e5b-4101-9428-b5c0b4e46f83.jpg

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1 Answer

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I am experiencing the same problem. I've had two different diagnoses:

1) Blower Motor Control Module/Resistor (under $40)
Dorman Part # 973442
2) AC and Heater Control Switch (Reman. Part: $234 + Core charge of $222.)
DORMAN Part # 599030
(Prices current from RockAuto.com.)

In addition to the recent blower problem, 5 years ago I had the A/C blowing out the floor/defrost vents only, too; but with no vacuum leaks. I was told then I needed the AC/Heater Control Switch; but instead I made it a "manual" automatic climate control. I disconnecting the vacuum connector plug from the control unit and used the male end to make the connections. It was much easier on my pocket book and still works today.

The connections I found on my 2003 Grand Marquis:
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Yellow: Floor/Defrost door
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I used a vacuum hose directly from Black to Blue and White. This required a short piece of vacuum hose with one T connection. The temp control still works including the fan speed control (until now). I live in Texas and it doesn't get too cold. But occasionally I connected Black to Yellow directly to get me thru those real bad cold spells.
Bottom Line: Not sure what I going to do but leaning towards replacing the Control Switch and the vacuum connector plug. Especially, since the price of the switch is more reasonable today. A 50% savings from 5 years ago.

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1 Answer

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