I was never able to find my air adjustment, picture is incorrect. If you have any kind of a blue flame forget it. I think the air must be factory set. The furnace in my 79 stream and my Snap-on Tool truck had adjustments. Over the 12 years I had the tool truck the most trouble I had was with the high temp limit switch. It would get dust inside and lock out. Over the years I learned not to remove the furnace with out first delivering two kicks with a # 12 combat boot to the lower right hand corner of the furnace ( limit switch location). This usually cured the problem by knocking the dust loose. Crude but very effective. Every time the furnace starts up in the 89 stream I wonder if it will light and
keep burning. I sometimes think that Suburban Furnaces are sired by iceboxes.

Dick Miller

On Tue, 05 Jan 1999 10:35:14 -0600 Roy Frazier writes:
>Richard & Rick,
> Thanks for the insight. My furnace has no cover to remove to  access
>air screw, (owners manual says it's there, but it's hiding!). I'll try
>replacing the igniter and see if that helps. My flame is blue, but not
>as well defined as the picture in the manual. Any other input on air
>adjustment would be appreciated!
>
>Roy
>
>Richard L. Miller wrote:
>>
>> The same thing happened to my 1989 34 ft. Was told to replace the
>> igniter. That was three years ago. It worked!!!! Furnace has been
>> running a lot in our cold TX weather.
>>
>> Dicl Miller
>>
>> On Mon, 04 Jan 1999 08:53:41 -0600 Roy Frazier
>> writes:
>
>> >The furnace on my '89 29' Excella works great for a while (day or two)
>> >and then the igniter gets cruded up. At that point, it fails to light.
>> >If I remove igniter and clean, it works great for a couple of more days.
>> >
>> >I removed and cleaned unit this Fall and thought that would cure
>> >problem, but "NOT".
>> >
>> >I can see the flame, it looks OK but I can't find the air  adjustment
>> >anyway.
>> >
>> >Help would be appreciated, 13 degrees F. today!