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Old 11-21-2010, 11:23 PM   #1
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Question

rooftop gas unit not heating


I tried to help a friend with his rofftop heating. This is spark ignition system: ribbon pilot ignites, flame sensor senses pilot, ignition module sends 24vac to main terminal on Honeywell GV but no main gas out! So I replace Gas valve but still- no good.Any toughts? There is 9" w.c. suply to GV


Last edited by keymanoman; 11-22-2010 at 12:15 AM.
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