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Topic: No Heat from Heater

in Forum: C3 Cooling and Heating Systems


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No Heat from Heater

Posted: 10/13/03 7:56pm Message 1 of 6
C3RVETTE
Former Member
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Anacortes, WA - USA
Joined: 12/16/2002
Posts: 1293
Vette(s): 1979 Red #72 C3 Corvette,T-350,Black interior,air,tilt/tele,K&N.And a 1978 Olds Cutlass 350/350,auto,air,2-dr.,buckets
Not getting heat,just air flow-whats up? Could it be the control panel? The lever moves OK. |headscratch| |confusing|


Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|

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No Heat from Heater

Posted: 10/14/03 11:31am Message 2 of 6
jedlevine
Former Member
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NORTH LAS VEGAS, NV - USA
Joined: 3/3/2003
Posts: 90
Vette(s): 1975 Coupe NOM 350: Edelbrock 64cc heads, QJet clone, Performer manifold & cam, gear drive and water pump; MSD ProBillet dist and 6A box, Comp rollers, Hedman headers into true duals, Magnaflow cans,TH400 w/shift kit, TT2's, 3.70RA, hi-rise hood
Check your block-to-heater lines for a vacuum or quarter turn manual valve. If you have one, it's there to block water flow to the heater core during warm weather. Which is exactly what may be preventing your heat from happening.

Good hunting!

|saluteflag|


No Heat from Heater

Posted: 10/15/03 9:05am Message 3 of 6
joe73vette
Former Member
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Eastern part of, CT - USA
Joined: 1/29/2002
Posts: 319
Vette(s): White 73 convertible - 350/auto, A/C PS, PB, PW, leather, t/t, two tops Also had a 69 t-top 20 years ago
Also, make sure the temp cable is still attached at both ends. You might have to remove the pass side dash panel and console trim to look. Joe


No Heat from Heater

Posted: 10/15/03 11:34am Message 4 of 6
C3RVETTE
Former Member
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Anacortes, WA - USA
Joined: 12/16/2002
Posts: 1293
Vette(s): 1979 Red #72 C3 Corvette,T-350,Black interior,air,tilt/tele,K&N.And a 1978 Olds Cutlass 350/350,auto,air,2-dr.,buckets
OK,I'll have to check.At least now I have something to look for. |thumb|


Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|

No Heat from Heater

Posted: 11/6/03 10:24pm Message 5 of 6
1972LT1
Former Member
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Joined: 7/17/2003
Posts: 38
This may be a stupid question but check to see if the heater hoses are connected to the heater core in the dash. If there was a coolant leak in the interior there may be a bypass connected or even hose from the water pump right back into the block. If this is the case I would suspect that you have a leaking heater core which was bypassed.


Charlie Carr |IMG|http://thumbs.webshots.com/s/thumb4/6/58/92/88765892IdgKRN_th.jpg|/IMG|

No Heat from Heater

Posted: 11/10/03 3:24pm Message 6 of 6
wrongsideup
Former Member
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loganville, GA - USA
Joined: 9/25/2003
Posts: 5
Vette(s): black '79
Check to make sure the vacume control is working. My heat valve is operated by a vacume type valve. Vacume closes it.You might not be breaking the vacume.


in Forum: C3 Cooling and Heating Systems


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