heater question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dman1982 · 01-16-2014, 05:42 PM

so I'm cleaning up my cluster and figured since i got all this out i might as well tackle some heater issues, my heater works, but it doesn't change or if it does change its when it wants to, it also only comes on when i turn it on full blast, what are some common issues caused by this? also the box on the passenger side makes this crazy sound like my truck is going to blow up haha...that is the most annoying thing tho, the defrost rarely comes on

84 k10, 350, scottsdale (if that helps)

**old Rusty C10** · 01-16-2014, 05:55 PM

sounds like a blower motor if its making a noise and prolly vacuum issues

dman1982 · 01-16-2014, 06:05 PM

thats what i was thinking....heck where do i start????

wilkin250r · 01-16-2014, 06:47 PM

Quote:

Originally Posted by dman1982

heck where do i start????

At Pick-N-Pull. Find a couple junkers and learn how they come apart.

If it only works at full blast, the problem is likely the resistor block or relay.

dman1982 · 01-16-2014, 06:54 PM

Quote:

Originally Posted by wilkin250r

At Pick-N-Pull. Find a couple junkers and learn how they come apart.

If it only works at full blast, the problem is likely the resistor block or relay.

Where are they located?

**old Rusty C10** · 01-16-2014, 10:24 PM

pick and pull is a junkyard that allows you to go in and pull your own parts check your local phone directory

dman1982 · 01-17-2014, 12:15 AM

Quote:

Originally Posted by old Rusty C10

pick and pull is a junkyard that allows you to go in and pull your own parts check your local phone directory

haha, i understand that...i meant where to look for that

motornut · 01-17-2014, 12:43 AM

with AC or without

**rs74** · 01-17-2014, 10:14 AM

Is this an AC truck or non AC? Have you tried pulling your glove box and looking in there? Do that while everything is running. Look in there while moving your vent selector and see if you can find anything that doesn't look right. Take a few pics and put them on this thread if you are not sure.

**rs74** · 01-17-2014, 10:27 AM

Also if the resistor is bad check out the blower motor too. If the bearing or anything else starts going bad then it will cause high resistance and burn out the resistor. If by chance the resistor doesn't fix the issue look at the switch in the control panel. You could probably get by for around $50 for blower motor and resistor if your fan cage is good at O'reilly's. If you are not in a hurry for parts look them up on http://www.rockauto.com/

dman1982 · 01-17-2014, 11:47 AM

Quote:

Originally Posted by motornut

with AC or without

i have a/c, and when i unhook that plug my heater works if its hooked up then it don't work...kinda weird i don't know how i discovered that but been like that for 5 years or so

motornut · 01-21-2014, 10:55 AM

Quote:

Originally Posted by dman1982

i have a/c, and when i unhook that plug my heater works if its hooked up then it don't work...kinda weird i don't know how i discovered that but been like that for 5 years or so

I'd open that make sure its not shorted/broke inside
a lot have a low speed on all the time for venting

dman1982 · 01-24-2014, 12:44 AM

Quote:

Originally Posted by motornut

I'd open that make sure its not shorted/broke inside
a lot have a low speed on all the time for venting

will do man, ill check it out tomorrow...its been acting weird here the last week or so

01-16-2014, 05:42 PM	#1
dman1982 Registered User Join Date: Jul 2010 Location: jacksonville nc Posts: 1,229	heater question so I'm cleaning up my cluster and figured since i got all this out i might as well tackle some heater issues, my heater works, but it doesn't change or if it does change its when it wants to, it also only comes on when i turn it on full blast, what are some common issues caused by this? also the box on the passenger side makes this crazy sound like my truck is going to blow up haha...that is the most annoying thing tho, the defrost rarely comes on 84 k10, 350, scottsdale (if that helps) __________________ Sgt Dennis Heineman USMC Aviation Ordnance I.Y.A.O.Y.A.S 2001-Present 84 K10 2000 trans am ws6 2011 nissan altima 2009 Troy Built with a 42 Inch Deck My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371

01-16-2014, 05:55 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	Re: heater question sounds like a blower motor if its making a noise and prolly vacuum issues __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-16-2014, 06:05 PM	#3
dman1982 Registered User Join Date: Jul 2010 Location: jacksonville nc Posts: 1,229	Re: heater question thats what i was thinking....heck where do i start???? __________________ Sgt Dennis Heineman USMC Aviation Ordnance I.Y.A.O.Y.A.S 2001-Present 84 K10 2000 trans am ws6 2011 nissan altima 2009 Troy Built with a 42 Inch Deck My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371

01-16-2014, 10:24 PM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	Re: heater question pick and pull is a junkyard that allows you to go in and pull your own parts check your local phone directory __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-17-2014, 12:43 AM	#8
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: heater question with AC or without Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

01-17-2014, 10:14 AM	#9
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: heater question Is this an AC truck or non AC? Have you tried pulling your glove box and looking in there? Do that while everything is running. Look in there while moving your vent selector and see if you can find anything that doesn't look right. Take a few pics and put them on this thread if you are not sure. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

01-17-2014, 10:27 AM	#10
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: heater question Also if the resistor is bad check out the blower motor too. If the bearing or anything else starts going bad then it will cause high resistance and burn out the resistor. If by chance the resistor doesn't fix the issue look at the switch in the control panel. You could probably get by for around $50 for blower motor and resistor if your fan cage is good at O'reilly's. If you are not in a hurry for parts look them up on http://www.rockauto.com/ __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie



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