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I have a nordyne electric furnace. when the control is set…

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I have a nordyne electric...
I have a nordyne electric furnace. when the control is set at auto the fan/blower will not function but if it on it works. model E1EB-015H. I read on another blog that it could be the limiting switch. how could I identify this part? All the other components are functioning. The coils are heating and the blower is working when on but not on auto. What would be a differential of problems causing this? Any thoughts?
Submitted: 2 years ago.Category: HVAC
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Answered in 1 minute by:
1/21/2016
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,367
Experience: Furnace, A/C and heat pump specialist.
Verified

Sounds like either a bad sequencer or bad fan relay.Can you verfiy all elements do come on?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

In heat mode the fan is brought on through the heat sequencer at same time first 2 elements are brought on. If the elements are coming on that tells us the sequencer is do its job but the fan rely is not.

This is not going to a limit issue.The limit would cause elements to go off and blower on.

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