blower motor running all the time - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RapidRide2 · 07-11-2005, 05:25 PM

My dad just bought a 79' chevy silverado with a big block. Does anyones blower motor run all the time with the key on power ????

hobbz · 07-11-2005, 05:27 PM

mine does that too, don't really bother me though

cliffsta · 07-11-2005, 05:38 PM

It's a safety feature by GM to keep air circulating through the cab.

This topic gets thrown around alot

RapidRide2 · 07-11-2005, 05:54 PM

thanks sorry to sound like a newbie.

GMC1tondually4dr · 07-11-2005, 07:00 PM

RapidRide2:

....................These guys wouldn't pull your leg.............would they..

.................Nahh!!....................

The switch is probably screwed up..........maybe.....?????

My wipers go on by themselves.......every once in a while.........turned on by

aliens I suspect..............this is not the first truck this has happened to....

.......is it a plot???.........should I be wrapping my wiper switch in tinfoil, like

the tin foil lining that I have in my hat??........will that keep the alien thought

and energy waves out......WOW.....I ..can ....feel...them....

..(put hat w/tin foil lining on)

..................It sure seems to work......jeezs....I ....hope ...so

Just my .02

CCDually

cliffsta · 07-11-2005, 10:05 PM

Quote:

Originally Posted by RapidRide2

thanks sorry to sound like a newbie.

Nah dude you don't sound like a newbie. My bad for sounding so snobby with my replay.

"The only dumb question is the one not asked." - Some Wise Dude

RapidRide2 · 07-11-2005, 10:54 PM

So you were kidding about the safety feature right???

NeCrOmAnCeR · 07-11-2005, 11:54 PM

No, It was done to prevent noxious gasses from accumulating in the cab. Mine does it too.

**N2TRUX** · 07-12-2005, 12:05 AM

My 77 does it too. If they key is on, the fan is running.

GMC1tondually4dr can I get a hit of what ever it is you are smoking....

GMC1tondually4dr · 07-12-2005, 01:22 AM

N2TRUCK:

....................Yeahhhhhhhh...................but ...........................

......It'll................cost..........ya......................welllllllllll...........

maybe not ...........THEY (you know who) WILL KNOW........

not enough...............tinfoil......................aaughhhhhh.......

...But seriously.....I have had a 1977 'Burb w/a SBC, a 1979 'Burb w/a 454,
and currently a1991 'Burb w/a 454 and a 1986 Crew Cab Dually w/a 454. NONE of them ran or run the fan without it being turned on.

Just my .02

CCDually

86swb · 07-12-2005, 09:51 AM

Mine started doing that and it was the (I think they called it a relay) where the wire plugs into. Chenged it out and now works fine (like it is suppose to).

**Captkaos** · 07-12-2005, 10:55 AM

The blower fan running is a feature of the flow-thru power ventilation system on the trucks.

SSC's76 · 07-12-2005, 02:21 PM

Mine has always done it. GM use to make an updated HVAC control module to eleminate the fan running. Two different ones Ive seen were a cheap resistor that elimitated low function "solder in, low off" and a whole new controll unit. If your hunting around the bone yard sometimes you can come across one of the two. Ive never seen one on a truck still one the road maybee the noxious gasses from the fan not running caused a crash.

86swb · 07-12-2005, 02:46 PM

I think my situation was a little different. Mine ran even when you turned the truck off. Had to unhook the battery. That is when I found out it was the relay. Did not know blowers were on all the time when the key was on.

NeCrOmAnCeR · 07-12-2005, 05:57 PM

Quote:

Originally Posted by GMC1tondually4dr

...But seriously.....I have had a 1977 'Burb w/a SBC, a 1979 'Burb w/a 454,
and currently a1991 'Burb w/a 454 and a 1986 Crew Cab Dually w/a 454. NONE of them ran or run the fan without it being turned on.

Just my .02

CCDually

Do these trucks have factory A/C?

GMC1tondually4dr · 07-12-2005, 11:40 PM

..Yep ...stone stock..... the Dually has a Master Hauler interior.

My Dually and the '79 Burb window wipers, would for no apparent reason, cycle for a time or two , then shut off never to be flicked again until needed...

I have heard from other '77 to '87 owners having the same problem.
No big deal, we figured the .........aliens did it.

Just my .02

CCDually

NeCrOmAnCeR · 07-13-2005, 09:46 AM

I have seen non-A/C trucks without the blower feature thats all. And the intermittent wiper sweep is usually caused by a delay module going bad.

Prerunner1982 · 07-13-2005, 04:03 PM

i have the wiper problem as well, first started out where it wouldnt shut off when turned on, replaced the switch.. now it just cycles every 12-15 min... i dont notice it anymore...

07-11-2005, 05:25 PM	#1
RapidRide2 Registered User Join Date: May 2004 Location: Saint Louis Posts: 76	blower motor running all the time My dad just bought a 79' chevy silverado with a big block. Does anyones blower motor run all the time with the key on power ????

07-11-2005, 05:38 PM	#3
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	It's a safety feature by GM to keep air circulating through the cab. This topic gets thrown around alot __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

07-11-2005, 07:00 PM	#5
GMC1tondually4dr Registered User Join Date: Jun 2004 Location: Rosemount, MN Posts: 341	RapidRide2: ....................These guys wouldn't pull your leg.............would they.. .................Nahh!!.................... The switch is probably screwed up..........maybe.....????? My wipers go on by themselves.......every once in a while.........turned on by aliens I suspect..............this is not the first truck this has happened to.... .......is it a plot???.........should I be wrapping my wiper switch in tinfoil, like the tin foil lining that I have in my hat??........will that keep the alien thought and energy waves out......WOW.....I ..can ....feel...them.... ..(put hat w/tin foil lining on) ..................It sure seems to work......jeezs....I ....hope ...so Just my .02 CCDually Last edited by GMC1tondually4dr; 07-11-2005 at 07:06 PM.

07-12-2005, 12:05 AM	#9
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	My 77 does it too. If they key is on, the fan is running. GMC1tondually4dr can I get a hit of what ever it is you are smoking.... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

07-12-2005, 01:22 AM	#10
GMC1tondually4dr Registered User Join Date: Jun 2004 Location: Rosemount, MN Posts: 341	N2TRUCK: ....................Yeahhhhhhhh...................but ........................... ......It'll................cost..........ya......................welllllllllll........... maybe not ...........THEY (you know who) WILL KNOW........ not enough...............tinfoil......................aaughhhhhh....... ...But seriously.....I have had a 1977 'Burb w/a SBC, a 1979 'Burb w/a 454, and currently a1991 'Burb w/a 454 and a 1986 Crew Cab Dually w/a 454. NONE of them ran or run the fan without it being turned on. Just my .02 CCDually Last edited by GMC1tondually4dr; 07-12-2005 at 01:33 AM.

07-11-2005, 05:27 PM	#2
hobbz Registered User Join Date: Jun 2005 Location: ashland, ky Posts: 632	mine does that too, don't really bother me though

07-11-2005, 05:54 PM	#4
RapidRide2 Registered User Join Date: May 2004 Location: Saint Louis Posts: 76	thanks sorry to sound like a newbie.

07-11-2005, 10:54 PM	#7
RapidRide2 Registered User Join Date: May 2004 Location: Saint Louis Posts: 76	So you were kidding about the safety feature right???

07-11-2005, 11:54 PM	#8
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	No, It was done to prevent noxious gasses from accumulating in the cab. Mine does it too.

07-12-2005, 09:51 AM	#11
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Mine started doing that and it was the (I think they called it a relay) where the wire plugs into. Chenged it out and now works fine (like it is suppose to). __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

07-12-2005, 10:55 AM	#12
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	The blower fan running is a feature of the flow-thru power ventilation system on the trucks. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

07-12-2005, 02:21 PM	#13
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	Mine has always done it. GM use to make an updated HVAC control module to eleminate the fan running. Two different ones Ive seen were a cheap resistor that elimitated low function "solder in, low off" and a whole new controll unit. If your hunting around the bone yard sometimes you can come across one of the two. Ive never seen one on a truck still one the road maybee the noxious gasses from the fan not running caused a crash. __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

07-12-2005, 02:46 PM	#14
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	I think my situation was a little different. Mine ran even when you turned the truck off. Had to unhook the battery. That is when I found out it was the relay. Did not know blowers were on all the time when the key was on. __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

07-12-2005, 11:40 PM	#16
GMC1tondually4dr Registered User Join Date: Jun 2004 Location: Rosemount, MN Posts: 341	..Yep ...stone stock..... the Dually has a Master Hauler interior. My Dually and the '79 Burb window wipers, would for no apparent reason, cycle for a time or two , then shut off never to be flicked again until needed... I have heard from other '77 to '87 owners having the same problem. No big deal, we figured the .........aliens did it. Just my .02 CCDually Last edited by GMC1tondually4dr; 07-12-2005 at 11:44 PM.

07-13-2005, 09:46 AM	#17
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	I have seen non-A/C trucks without the blower feature thats all. And the intermittent wiper sweep is usually caused by a delay module going bad.



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07-13-2005, 04:03 PM	#18
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	i have the wiper problem as well, first started out where it wouldnt shut off when turned on, replaced the switch.. now it just cycles every 12-15 min... i dont notice it anymore... __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

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