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blower motor cycling on an off

2K views 1 reply 2 participants last post by  SKIP4661 
#1 ·
i have a old 70% american standard gas furnace, once i call for heat the furnace starts and it fires up, the blower comes on but shortly turns off , then on again ,off again continuously, what should i check? i am a very new hvac tech and i am stumped , any suggestions ?
 
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