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Heil Condensing Upflow Gas Furnace Model NUGK075AG02


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3 replies to this topic

#1 Fixitman2

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Posted 15 August 2011 - 10:04 PM

When blower failed to run in "Fan Auto" or "Fan On" modes, I replaced the blower relay, and the AC ran normally for one month and then the relay failed again. I replaced the blower relay again, and the AC ran normally for two more months but failed again. What could be causing the blower relay to continue to fail?

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#2 RegUS_PatOff

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Posted 16 August 2011 - 04:14 AM

How is it failing ?
Relay Contacts "burned" ?
Relay Coil "open" ?

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#3 ACtechGUY

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Posted 16 August 2011 - 06:17 AM

The correct relay is one rated for 12 amps at full load(FLA). Assuming you are using the right part , there is one reason for failure.
Relay
PART NUMBER: 90-340







Failing blower motor or failed capacitor . The motor is drawing more than the rated amps on the relay.



#4 Dan Webster

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Posted 16 August 2011 - 10:43 AM

What relay are you using?
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