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

kulturekat · 03-12-2009, 12:26 PM

ive been chasing electrical gremlins for a while now. my heaters been working great. yesterday before going home it wouldnt turn on. well sure enough it decides to rain sleet then snow this morning. ice on the windows sucked with no defrost and driving with no heat. i installed a new relay and it worked for a second now it doesnt i can hear it click bu tnothing. i checked the fuse block and no blown fuse and i get a light with my tester granted its a little more faintthen the other fuses. any ideas on where to check now. i even redid the crimps on he connections to the relay. thanks in advance.

**LockDoc** · 03-12-2009, 01:55 PM

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Does your truck have air or just heat?

LockDoc

sneakysnake · 03-12-2009, 02:07 PM

Start at the blower motor and see if your getting voltage there, if so sounds like your do a new blower if not then trace it back till you locate the problem.

kulturekat · 03-12-2009, 03:04 PM

its originally an air and heat but i have the air all taken out so im only running the heater.

ill try the blower motor. where exactly is it at?

craig24671 · 03-12-2009, 03:11 PM

the blower motor is inside the black cover under your hood on the passenger side, I think there is 3 or 4 nuts u need to take off to get the blower motor out. If I remember right there is one wire on the outside of the motor

*b-rad* · 03-12-2009, 03:17 PM

under the hood look to your left were your heater core is one orange wire coming out of the fire wall check it for 12 volts

kulturekat · 03-12-2009, 03:29 PM

Awesome thanks so much guys

Longhorn Man · 03-12-2009, 04:16 PM

you should start with grounding that relay properly too.

03-12-2009, 12:26 PM	#1
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	heater problems ive been chasing electrical gremlins for a while now. my heaters been working great. yesterday before going home it wouldnt turn on. well sure enough it decides to rain sleet then snow this morning. ice on the windows sucked with no defrost and driving with no heat. i installed a new relay and it worked for a second now it doesnt i can hear it click bu tnothing. i checked the fuse block and no blown fuse and i get a light with my tester granted its a little more faintthen the other fuses. any ideas on where to check now. i even redid the crimps on he connections to the relay. thanks in advance.

03-12-2009, 01:55 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,395	Re: heater problems - Does your truck have air or just heat? LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

03-12-2009, 02:07 PM	#3
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	Re: heater problems Start at the blower motor and see if your getting voltage there, if so sounds like your do a new blower if not then trace it back till you locate the problem.

03-12-2009, 03:04 PM	#4
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	Re: heater problems its originally an air and heat but i have the air all taken out so im only running the heater. ill try the blower motor. where exactly is it at? Attached Images

03-12-2009, 03:11 PM	#5
craig24671 Registered User Join Date: Oct 2006 Location: Overton,Texas Posts: 148	Re: heater problems the blower motor is inside the black cover under your hood on the passenger side, I think there is 3 or 4 nuts u need to take off to get the blower motor out. If I remember right there is one wire on the outside of the motor

03-12-2009, 03:17 PM	#6
b-rad Account Suspended Join Date: Nov 2007 Location: FT STEWART GA Posts: 509	Re: heater problems under the hood look to your left were your heater core is one orange wire coming out of the fire wall check it for 12 volts Attached Images

03-12-2009, 03:29 PM	#7
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	Re: heater problems Awesome thanks so much guys

03-12-2009, 04:16 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: heater problems you should start with grounding that relay properly too.



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