Heating, Air Conditioning, Fridge, HVAC/Worn Out Nox Rods on Weatherking Furnace
Jim: I live in California and I have a gas WeatherKing updraft 60000 BTU input upflow residenial furnace.
Model# GUWHE060C-D3C, S/N GN3D204 F4788 1882 Mfg date 1987
While getting it ready for start up a few days ago, I noticed that the Nox Rods are in very poor shape.
This furnace has three 1 inch burner tubes, which extend into the heat exchanger. Each burner tube has two 0.250" x 18.5" Nox rods, which run parallel to it, are about .250” above it, and are separated from each other (center to center) by .750”. All 6 nox rods have disintegrated or corroded sections which have narrowed down to .125" to .062" in dia and all 6 rods are severely sagging in these areas.
At Sears Parts Direct, there are no Nox rods shown or offered on their GUW series Weatherking page. However, on their page for a Goodman GDPS100-4 furnace, the burner tubes and nox rods look exactly like what I have. The link for the Goodman diagram/parts list is:
The Nox rods are Item 7 and are Goodman Part #: B18112-00 ($69.92 ea).
I have also located these same B18112-00 nox rods at:
for $10.50 ea.
At the kinghvacparts site they are described as B18112-00 .250" x 18.5" (exactly the same size as the nox rods in my WeatherKing).
Here are my questions:
Q1. Can I remove the existing degraded nox rods now, and operate the furnace safely without them, until I get replacements? I am not worried about a few days of making more nox, I just want to make sure there is no possibility of damaging the heat exchanger or burner tubes.
Q2. Is there any reason that the Goodman B18112-00 nox rods would not be a fully compatible replacement part for my WeatherKing? I guess it might be a different alloy, but since they are all Nox rods, it seems like it should be close enough? I read somewhere that furnace nox rods in general include silver in the alloy mix....
Q3. I haven't tried to remove any of the rods yet. I suspect they may break as I attempt to remove them. If they do, any suggestions? I suppose that if they break and I cannot get the far ends out of the far end holes, I will have to remove the burner assy to do that. More work, but, probably not so bad....
Q4. What happens if a less observant guy lets the nox rods break up unknowingly on top of the burner tubes? I guess they might plug up some of the burner ports and obstruct the flame to some extent. I don’t see that necessarily being a big safety issue. Have you ever seen cases of neglected, disintegrated, and broken up nox rods above the burner tubes?
I don't know where you are located, nor do I know if nox rods are used anywhere besides California. I am hoping you have some experience with these type of nox rods.
Thanks for your time in consideration of this question. V/R, Steve
Your question is my first introduction to nox rods, I have no experience with same.
I understand it's strictly a California thing. I also was told it's strictly for horizontal furnaces,
there is a recall for horizontal furnaces but no mention of up-flow furnaces.
Sorry I can't help.