induction motor runs burners don't light

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  #1  
Old 12-05-08, 10:55 AM
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induction motor runs burners don't light

I have a tech-4 true blue 90 the induction motor comes on but the burners don't light. Motor then keeps running won't shut off. any ideas?
 
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Old 12-05-08, 01:14 PM
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Possibly the vacuum sensor switch. or a problem causing it to lockout. Look for a small hose running from the induction blower housing to the vacuum switch. Remove it from the blower and suck on it like a straw while starting the furnace cycle. If the furnace kicks on, you probably have an obstruction. If not, the switch may be bad.
 
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