A/c/heater issue - Chevy Impala SS Forum
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post #1 of 12 (permalink) Old 12-31-2014, 02:41 PM Thread Starter
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A/c/heater issue

So i turn on the Heater and i started smelling a burning burnt plastic electrical smell coming out of my defrost vent, the smoke wasnt coming from the engine compartment, it was coming from the vents under the winsheild wipers, and it smelt like there was a short or something white smoke, also when ever i turn the knob to Max you can hear the blower motor(i assume) sounding like a garbage disposal. i replaced the heater core about a year ago and this is the first time it has gotten cold since i did that. could it be the blower motor and where is it located
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post #2 of 12 (permalink) Old 12-31-2014, 06:16 PM
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blower motor

I do beleive the blower motor is behind the RIGHT inner fender panel.Take out the lower bolts and pry inner fender inward and hold open with a piece of 2x4. the motor is right there.Tom.
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post #3 of 12 (permalink) Old 12-31-2014, 09:32 PM
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The blower is accessed from under the dash. You need a 5.5mm socket. First remove the door sill, then the kick panel, and the under dash insulator. The fan is in the corner next to the resistor pack. There are 3 bolts holding it. The wiring is always in the way, so you may have to separate a couple of connectors. The fan should drop straight down. You may find all sorts of vermin and assorted junk in the fan. If the fan motor is toast, you should get a used one, because the replacement fans do not seal properly a the top, and you get much less air from them, because the high pressure air leaks back into the intake.

The fan intakes air from the airbox under the cowl.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #4 of 12 (permalink) Old 01-02-2015, 11:37 AM
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Garage
I find that buying a cheap 5.5mm socket and grinding it down just a little on the end helps remove the rounded edges and helps the socket hold the heads better.

-Brian

'95 B4U LT1/T56 in Purple Pearl. 24x 355 with I believe most of the bolt-ons.
'63 C10 LT1/4L60E from B-Body. Rides like a Cadillac thanks to air bags.
'06 GTO LS2/T56 Torrid Red with CAI and Borla Cat-back thanks to the lady who rear ended me.
Still in Wichita.
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post #5 of 12 (permalink) Old 02-28-2015, 01:54 PM
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I'm having trouble with my Heat ...it just started yesterday when I can hear the something starting to slow down behind the dash then my heat started to slowly come out the vents then completely stopped so I tried cycling through all the temp. controls on the A/C / heater switch and was hearing hissing from the switches and I gets no response from fan switch either but the crazy part is I do get heat blowing thru the vents when cruising on the highway or when im actually moving in general
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post #6 of 12 (permalink) Old 02-28-2015, 07:36 PM
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Do not know about the newer cars , but the older cars had a resister " pack " to allowed the fan motor to run at a slower speed on low & medium .

Those can also burn out and " kill " the fan .

What year ? Impala or Caprice ?

When the car is moving , air may be pushed through the heater , giving some air flow inside the cabin .

God bless
Wyr
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post #7 of 12 (permalink) Old 02-28-2015, 07:41 PM
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Quote:
Originally Posted by WyrTwister View Post
Do not know about the newer cars , but the older cars had a resister " pack " to allowed the fan motor to run at a slower speed on low & medium .

Those can also burn out and " kill " the fan .

What year ? Impala or Caprice ?

When the car is moving , air may be pushed through the heater , giving some air flow inside the cabin .

God bless
Wyr
I have a 96 impala ss
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post #8 of 12 (permalink) Old 02-28-2015, 07:54 PM
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Do not know for sure about the fan location .

My car is a 1991 Caprice 5.0l .

Do not know if the fan location is the same ?

God bless
Wyr
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post #9 of 12 (permalink) Old 02-28-2015, 08:41 PM
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Quote:
Originally Posted by WyrTwister View Post
Do not know for sure about the fan location .

My car is a 1991 Caprice 5.0l .

Do not know if the fan location is the same ?

God bless
Wyr
yeah I'm not sure but I bought one of those haynes manuals from autozone today on the 94-96 caprice/impala SS so I should be good
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post #10 of 12 (permalink) Old 02-28-2015, 09:13 PM
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Books

Good move . I have both Chiltons and Haynes books on many of the cars I have owned .

Sometimes if one book does not cover what I am trying to repair , the other book will

God bless
Wtr
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