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Topic: heater doesn't blow out heat through vents

in Forum: C3 Cooling and Heating Systems


heater doesn't blow out heat through vents

Posted: 11/15/03 7:36pm Message 1 of 6
Former Member
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Joined: 9/30/2003
Posts: 1
Vette(s): 1981 Red Glass T-Tops L-82 It's one HOT car!!!
Dont know why the heat doesn't blow out through the vents. I can get some heat from vent on dashboard. But the switch to turn heat on (0-1-2-3-)doesn't work. Any suggestions???? Does this car have a heater blower? |withstupid|


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heater doesn't blow out heat through vents

Posted: 11/16/03 5:45pm Message 2 of 6
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WEST SENECA, NY - USA
Joined: 12/3/2001
Posts: 2379
Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.
Hi vettemom81!
The 0-1-2-3 switch would be your fan speed control switch. The are a couple possible things wrong.
1. Your fan/blower motor may have gone bad.
2. Your fan speed switch (0-1-2-3) may be bad.
3. This is the most common thing...your resistor for fan speed may have gone bad.
This is located at the passenger side firewall, on top of the heater core case. It has some wires plugged into it and has 2 tiny screws holding it on. Remove this and look for burnt wires and check the little coils (they look like little springs)to see if they are broke or burnt. Good luck!
Sarge |wavey|



GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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heater doesn't blow out heat through vents

Posted: 11/16/03 8:05pm Message 3 of 6
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Joined: 1/29/2002
Posts: 1049
Check your hoses. They might be dry rotted!!


heater doesn't blow out heat through vents

Posted: 11/26/03 7:38pm Message 4 of 6
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ATOKA, TN - USA
Joined: 9/25/2002
Posts: 120
Vette(s): 1975 Coupe, 1998 Coupe, 2000 coupe
Can you hear the fan come on at all. You should be able to hear the blower when you turn on the switch. If the blower isn't working, then it could be anything from a fuse, defective switch, broken wire, or even a bad fan, among other things. You can check the wiring by using a multimeter and check the voltage at the blower. |headscratch|


1975/L48/Coupe/4 Speed(1 of 1057)/Headers/true duals/aluminum intake/holley 750/MSD ignition/roller rockers/ |IMG|http://www.C3VR.com/member_uploads/1701_1800/1717/BSVette75d_sig.jpg |/IMG|

heater doesn't blow out heat through vents

Posted: 12/27/03 10:05pm Message 5 of 6
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Wayne, NJ - USA
Joined: 5/31/2002
Posts: 973
Vette(s): White 1975 L48 Stingray 129,000 Miles, daily driver.
if you've never had heat or A/C work, you might want to check and see if the ducting is there. Mine isn't and its availability is part of why I've never considered fixing heat or A/C.

Scot


heater doesn't blow out heat through vents

Posted: 1/3/04 9:42pm Message 6 of 6
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ORLANDO, FL - USA
Joined: 12/11/2002
Posts: 459
Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
This happened to me two times. Both times it was a blown fuse.


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 

in Forum: C3 Cooling and Heating Systems


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