The natural gas infrared broiler in our 8 year old DCS RG 304 does not fully light.
The gas valve opens, you can hear the gas flowing, but only a lazy loafing blue flame ignites back by the electric igniter. Then a strong smell of gas begins to emanate from the vent back, and I turn it off before the big bang.
I have verified the gas line connections to the broiler are not leaking. There is no air shutter on the broiler, so there is no real air/gas adjustment. The oven and stove top burners function normally. I verified the orifice is not plugged. The infrared broiler screen, inside the oven, is clean. From the back of the range, looking down the broiler burner tube, the inside of the tube, appears to have some oxidation.
Local service tech (only parts changer in town) does'nt offer any ideas other than changing the ignitor yet again. There is definitely gas flowing, hear it and smell it.
Are there holes in the main burner tube that may be plugged by oxidation, not letting the gas out to be fully ignited?
Does a main burner tube on infrared broiler work the same as a plain ole blue flame broiler (little holes on sides to let flames out) just with the fancy infrared screen added?
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DCS RG 304 Infrared Broiler gas flowing, not lighting up
Started by
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, Mar 15 2009 04:12 PM
7 replies to this topic
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#2
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Posted 15 March 2009 - 05:32 PM
[user=48415]flytyer[/user] wrote:
Was it the correct replacement part number ?
Yes, the holes may be clogged ...
When was the Ignitor last changed ?Local service tech (only parts changer in town) does'nt offer any ideas other than changing the ignitor yet again. There is definitely gas flowing, hear it and smell it.
Are there holes in the main burner tube that may be plugged by oxidation, not letting the gas out to be fully ignited?
Was it the correct replacement part number ?
Yes, the holes may be clogged ...
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#3
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Posted 15 March 2009 - 05:41 PM
[user=48415]flytyer[/user] wrote:
An orifice can look open yet still be dirty. Grease plugs are obvious but much less obvious is a thin layer of grease on the inside of the bore. You have to include an orifice cleaning as part of your approach to this problem because it's an obvious thing to do and it probably needs it anyway. To clean: Remove the orifice and drop some rubbing alcohol in there. Blow it out with compressed at (70 psi min.) using a squirter nozzle with a rubber tip so you can get a tight seal against the brass orifice.I verified the orifice is not plugged.
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#4
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Posted 15 March 2009 - 05:50 PM
Broiler ignitor was replaced 1 month ago. Service guy ordered it from DCS and it took a month to get here. I assume, I know bad thing to do, that he knew what he was doing. Although he left without the broiler working and promised to come back. Yea right.
#5
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Posted 15 March 2009 - 05:56 PM
Ok, makes sense and I'm willing to do this, but to get the orifice off, do I have to drop the whole infrared broiler out from the front of the oven? Once the gas line and ignitor wires are disconnected is it just the screws in the broiler flange holding the unit?
#6
Samurai Appliance Repair Man
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Posted 15 March 2009 - 06:12 PM
Unscrew the IR burner assembly (#8 in the attachment) and you can get to the orifice (#9).
Attached Files
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dcs-rg-304-oven-diagram.pdf 88.32K
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dcs-rg-304-oven-diagram.pdf 88.32K
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#7
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Posted 20 March 2009 - 09:13 AM
Will be taking the broiler out tonight, but had a thought -- Since the broiler does not have an air shutter, and since I live at about 5000' above sea level, should a different orifice be used on the broiler for high altitude? The DCS RG 304 came with a #47 orifice. How can I tell if it is indeed an #47 orifice?
Got the orifice out, interestingly, it is stamped #49, so maybe it was already adjusted for altitude.
It is sooty, so I will give it the alcohol bath and blow.
Could not ignore my curiosity, so I took the whole infrared broiler apart to see how it works. No holes in the main burner venturi tube, that I could find. Gas/air must just mix and blow out the open end of the tube opposite the gas inlet.
Got the orifice out, interestingly, it is stamped #49, so maybe it was already adjusted for altitude.
It is sooty, so I will give it the alcohol bath and blow.
Could not ignore my curiosity, so I took the whole infrared broiler apart to see how it works. No holes in the main burner venturi tube, that I could find. Gas/air must just mix and blow out the open end of the tube opposite the gas inlet.
#8
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Posted 20 March 2009 - 07:42 PM
Well cleaning the orifice seemed to help, a lot.
I have a nice 1/8 layer of blue flame, waiting for the screen to glow red.
Still get a gas smell on start up before it ignites.
Should you start it with the oven door open or closed?
Tomorrow I'll let it run to burn any accumulated invisible crud off the screen.
I have a nice 1/8 layer of blue flame, waiting for the screen to glow red.
Still get a gas smell on start up before it ignites.
Should you start it with the oven door open or closed?
Tomorrow I'll let it run to burn any accumulated invisible crud off the screen.
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