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    • Appliantology Live Dojo, Saturday, 4/27/2024 @10 AM ET
      27 April 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. 
      We have a special session planned for this one. Instead of the usual Show 'n Tell on a technical topic, we're going to post tech sheets in the comments to this Calendar Event (scroll down to see what's posted so far) and ask specific questions that can only be answered by reading the tech sheet. If you at least try to answer the questions beforehand, you'll get a lot more out of it. The tech sheet and the questions are posted in the comments section below.
      Your mission, if you should choose to accept it, is to check out the questions for each one and try to answer them ahead of time. Then come to the Dojo to see how well you did! 
      Who: This workshop is only available to tech members at Appliantology.
      When: Saturday, April 27 @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/

Nordyne RK80+ Downflow

kipperps28

By kipperps28
in DIY Appliance Repair Help

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kipperps28

kipperps28

Posted
Posted

The furnace will turn on the blower, then igniter will glow red, but none of the burners will fire. Red light is blinking 4 (ignition failure). All grounds look good. Red light is also on solid when furnace is commanded on. Unit is under warranty (6 months old) but it is Sunday, and can't get ahold of warranty Co. Any help would be appreciated.

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Scottthewolf Sensei

Scottthewolf

Posted
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You probably have a weak hot surface glowbar ignitor, just because it glows red does not mean it is working correctly.  The ignitor shouuld glow bright orange/almost white, if not, it probably isn't getting hot enough or drawing enough amperage to make the gas valve open.

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kipperps28

kipperps28

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Yes, gas is on (hot water heater is next to furnace, and line T's off of same supply (water heater is working). The info on the igniter is interesting. Is there an ohm spec on the igniter, or do you just swap in a "known" good one? Thanks for the help, guys! BTW, the igniter does actually glow orange, though not at all white. I will have a call into my warranty Co tomorrow, if I don't figure it out myself. I will post the cause when I know.

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AccApp Sensei

AccApp

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Posted

Is the control board sending voltage to the gas valve after the ignitor glows? The gas valve is not dependant upon amp draw from the ignitor but is a timed sequence. Are you certain the burner does not light at all?

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kipperps28

kipperps28

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Yes, I am sure. There are 4 burners, and my understanding is they fire in a linear fashion, with the left side (flame sensor) burner being the last in line. None of the four fire. I have not tested for power at the gas valve. There is one yellow wire and one brown wire (these originate at the circuit board). I would assume only one of these would provide power for the valve...

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AccApp Sensei

AccApp

Posted
Posted

Check the valve's coil for resistance by removing the brown and yellow wires. If it is open electrically we know the gas valve is bad. You can measure the voltage to the gas valve by leaving the brown and yellow wires removed and checking the voltage between them after the ignitor has been glowing at least 30 seconds. Expect it to be around 24 vac.

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