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| Nordyne RK80+ Downflow | Rate Topic |
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| Posted: Sun Feb 25th, 2007 03:51 pm |
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1st Post |
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kipperps28 Senior Apprentice Appliantologist
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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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| Posted: Sun Feb 25th, 2007 06:06 pm |
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2nd Post |
Scottthewolf
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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.
____________________ Scott Wolf |
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| Posted: Sun Feb 25th, 2007 06:22 pm |
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3rd Post |
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hvacdrd Fellow, Academy of Sublime Masters of Appliantology 
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Check the basics too - is the gas on? Do your other gas appliances work?
____________________ Tip Jar |
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| Posted: Sun Feb 25th, 2007 11:02 pm |
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4th Post |
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kipperps28 Senior Apprentice Appliantologist
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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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| Posted: Mon Feb 26th, 2007 12:23 am |
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5th Post |
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AccApp Fellow, Academy of Sublime Masters of Appliantology 
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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?
____________________ "When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle. http://www.fixitnow.com/beerfund.htm |
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| Posted: Mon Feb 26th, 2007 12:45 am |
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6th Post |
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kipperps28 Senior Apprentice Appliantologist
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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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| Posted: Mon Feb 26th, 2007 11:00 am |
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7th Post |
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AccApp Fellow, Academy of Sublime Masters of Appliantology
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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.
____________________ "When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle. http://www.fixitnow.com/beerfund.htm |
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| Posted: Mon Feb 26th, 2007 03:50 pm |
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8th Post |
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kipperps28 Senior Apprentice Appliantologist
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Repair guy came out this morning and replaced the gas valve with a new one. Works like a charm. Thanks for the help!
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