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  • Upcoming Events

    • 30 March 2024 02:00 PM Until 03:00 PM
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      All Appliantology tech members are invited to join in this workshop on all things Appliantological: bidness, customers, tools, troubleshooting, flavorite brewski, whatever. Webcams and microphones are open and live!
      This workshop is also a great time for any students at Master Samurai Tech to bring any and all questions about the coursework. We're happy to walk through any concepts you're having trouble with. Think of it like office hours with your teachers. 
      If you have a specific appliance problem you'd like us to talk about, post it here! We need a problem statement and a PDF of the tech sheet or schematic so we can all see it on screen share. If you have a PDF that isn't already in the File library here at Appliantology, send it to us by attaching it to the contact form. 
      Also, follow this Calendar Event so you'll get notified of new posts here. Look for the "Follow" button either at the top of the topic on desktop or below the topic on mobile.
      Who: This workshop is only available to tech members at Appliantology.
      When: Saturday, March 30 @10:00 AM Eastern Time.
      Where: Online via Zoom
      How:
      Click here to go to the forum topic with the registration link. If you're interested, register now. Arrive a couple minutes early to make sure your connection is working. Set a reminder for yourself for this workshop so you don’t miss it.  And check out past workshops here: https://appliantology.org/announcement/33-webinar-recordings-index-page/

Heil Condensing Upflow Gas Furnace Model NUGK075AG02


sperhaam

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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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How is it failing ?

Relay Contacts "burned" ?

Relay Coil "open" ?

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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.

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