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Old 12-12-2010, 06:39 PM   #1
ol yellow 72
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no heat in my 83

hey guys i recently got my 83 back on the road and to my suprize i have no heat, all the switches r working fine, i flushed the heater core, changes thermostat, checked for air pockets everything i know to du but i still have minimal heat, i sold this truck in october and the heat was great, it set until i bought it back last week and now no heat, please help b4 i freeze
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Old 12-12-2010, 06:46 PM   #2
old Rusty C10
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Re: no heat in my 83

if its a non ac truck make sure the door is opening for the heater door
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Old 12-12-2010, 07:07 PM   #3
ol yellow 72
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Re: no heat in my 83

its an a/c truck sorry forgot to add that
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Old 12-12-2010, 07:24 PM   #4
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Re: no heat in my 83

could the blower motor under the hood quit?
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Old 12-12-2010, 09:36 PM   #5
tucsonjwt
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Re: no heat in my 83

Do you have air coming out of the ducts but just not warm air? Or is it warm air, just not a lot of force to the air blowing out? Lots of air with no heat - I suspect you need a new heater core, assuming the thermostat is the right temp and working. Hot air but no force - I suspect weak blower motor or relay.
Does the A/C work properly? Also, as mentioned, the cable going the the door in the heater box may not be working properly or disconnected - you should be able to feel/hear the door open when you move the control lever to the heat marking - there is a bit of resistance in the cable/lever assembly.
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Old 12-13-2010, 12:01 PM   #6
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Re: no heat in my 83

ttt
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Old 12-13-2010, 01:46 PM   #7
WigglesTheHoly
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Re: no heat in my 83

I was thinking blower motor as well. is it blowing but just isn't very hot or are you getting barely any push?
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Old 12-13-2010, 05:13 PM   #8
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Re: no heat in my 83

i would definitely check your blend door. Take the glove box out and feel for it to be all the way to the left in its movement.
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