Heater/AC Blower Speed Resistor Noise - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kenm78 · 12-14-2010, 06:01 PM

My 82 K10 Heater resistor is screaming! I't has been making this screaming noise intermentantly for the last year but today it would not go away. I have tried replacing the relay below it but the new relay causes fuses to pop so I assume the relay is bad from the manufacture. Is my resistor bad or my fan? When it isn't screaming the fan works great, but when it is the fan is slow and weak..

Restrorob · 12-14-2010, 10:39 PM

I'm gonna say it's your fan motor, My Jeep started doing the same thing couple days ago. Take the fan out and put a few drops of oil on the shaft bushing, You can drill a small hole center of the bump on the other end of the motor then add a couple drops in that end. Put a dab of RVT Silicone over the hole to re-seal it.

Doing this will save buying a new motor during the holidays.....

kenm78 · 12-14-2010, 10:53 PM

Quote:

Originally Posted by Restrorob

I'm gonna say it's your fan motor, My Jeep started doing the same thing couple days ago. Take the fan out and put a few drops of oil on the shaft bushing, You can drill a small hole center of the bump on the other end of the motor then add a couple drops in that end. Put a dab of RVT Silicone over the hole to re-seal it.

Doing this will save buying a new motor during the holidays.....

The motor doesn't seem to be making the noise. It sounds and you can feel the vibrations from the noise at the actual resister mounted in the ac avaporator housing . I can unplug it and it stops. Went back outside a hour or so ago and I couldn't duplicate the issue. It's the darndest thing. I will look into the motor like you suggest.

bucannon · 12-15-2010, 01:21 AM

my fan has been making this noise off and on for years... i believe it is the motor

Restrorob · 12-15-2010, 07:32 AM

Quote:

Originally Posted by kenm78

I can unplug it and it stops.

When you unplug the resister your killing power to the blower so it won't make the noise.....

theprestongroup · 12-15-2010, 03:16 PM

Unplug the fan motor, and run a jumper wire from the battery to the motor. If the noise is still there its your motor.

allengator · 12-15-2010, 03:43 PM

most likely the fan motor has failing bearings...
thats why it slows down and draws more current

48cj2a · 12-15-2010, 06:09 PM

There is nothing in the resistor to make noise...smoke maybe but no noise. The blower motor and the vent doors are really the only moving parts...has to be the motor bearings if you have not disturbed the squirel cage fan itself to alter its balance.

12-14-2010, 06:01 PM	#1
kenm78 Broken Down Join Date: Dec 2006 Location: Choctaw, Oklahoma Posts: 1,267	Heater/AC Blower Speed Resistor Noise My 82 K10 Heater resistor is screaming! I't has been making this screaming noise intermentantly for the last year but today it would not go away. I have tried replacing the relay below it but the new relay causes fuses to pop so I assume the relay is bad from the manufacture. Is my resistor bad or my fan? When it isn't screaming the fan works great, but when it is the fan is slow and weak.. __________________ kenm78 1982 Chevy 4X4 Project truck “It’s better to keep your mouth shut and let people wonder about your ignorance, than open your mouth and reveal all doubt”

12-14-2010, 10:39 PM	#2
Restrorob The One And Only !!! Join Date: Jan 2007 Location: Hole in the woods Florida Posts: 4,567	Re: Heater/AC Blower Speed Resistor Noise I'm gonna say it's your fan motor, My Jeep started doing the same thing couple days ago. Take the fan out and put a few drops of oil on the shaft bushing, You can drill a small hole center of the bump on the other end of the motor then add a couple drops in that end. Put a dab of RVT Silicone over the hole to re-seal it. Doing this will save buying a new motor during the holidays..... __________________ 93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. *"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!*

12-15-2010, 01:21 AM	#4
bucannon Salty Sailor Join Date: May 2009 Location: Savannah, Ga Posts: 603	Re: Heater/AC Blower Speed Resistor Noise my fan has been making this noise off and on for years... i believe it is the motor __________________ 86 c-10 Custom Deluxe Savannah, Georgia

12-15-2010, 03:16 PM	#6
theprestongroup Registered User Join Date: Dec 2007 Location: Houston, TX Posts: 18	Re: Heater/AC Blower Speed Resistor Noise Unplug the fan motor, and run a jumper wire from the battery to the motor. If the noise is still there its your motor.

12-15-2010, 03:43 PM	#7
allengator Registered User Join Date: Dec 2010 Location: Burleson, Texas Posts: 596	Re: Heater/AC Blower Speed Resistor Noise most likely the fan motor has failing bearings... thats why it slows down and draws more current __________________ Allengator Outta the Blue (my band - available for hire in the DFW area!) 1980 Chevy SWB Pickup (build thread) 1951 Chevy Sedan Delivery 2004 Chevy Tahoe Z71 2011 Harley Davidson Street Glide 2018 Silverado Z71 Crew Cab

12-15-2010, 06:09 PM	#8
48cj2a Registered User Join Date: Feb 2010 Location: Central, IL Posts: 599	Re: Heater/AC Blower Speed Resistor Noise There is nothing in the resistor to make noise...smoke maybe but no noise. The blower motor and the vent doors are really the only moving parts...has to be the motor bearings if you have not disturbed the squirel cage fan itself to alter its balance. __________________ 03 Suburban Z71 Z71 98 GMC Yukon SLT 4x4 Yukon 86 M1009 CUCV Project Milverado 48 Willys CJ2A 48CJ2A



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