Lennox G26 ignition

[ffresh]

Gentlemen
I have a problem with a Lennox G26Q4/5-125-1 / Ser 5894D56584
furnace. The furnace operates wonderfully, with the following exception:
If the burner box "door" is fastened securely (in the normal manner) to the burner box, ignition is not successful. The ignition sequence is as follows (looking through view port):
Thermostat calls for heat, combustion blower/IDM operates, pilot light fires up but burners do not fire off - I guess the main gas conduit to the burners is locked out. If, however, I remove the burner door/cover, or attach it "loosely", ignition occurs normally and without fail. It appears as though the ignition process is starved for O2 with the burner box securely sealed. I have ensured that all pressure sensing lines are clean and have sanded the front end of the burner assembly (flame propogation?). I have cleaned the flame sensor (metal rod emerging from the ceramic fixture), also. I am considering adjusting the pilot gas pressure and/or adjusting the positioning of the pilot position in relation to the burners - not sure if this will help, however. I am at my wits end!!! Any help or suggestions to correct this situation would be GREATLY appreciated. Thank in advance

[Juleous]

Moving the pilot flame will result in BOOM do not try that. Lot's of reasons I can think of that would cause that, DIY answers are not allowed.

[ffresh]

Moving the pilot flame will result in BOOM do not try that. Lot's of reasons I can think of that would cause that, DIY answers are not allowed.

Juleous
Thank you for your QUICK response; I appreciate it!
Please excuse my naivete but I am not sure what you mean by DIY answers are not allowed

[stebs]

Juleous
Thank you for your QUICK response; I appreciate it!
Please excuse my naivete but I am not sure what you mean by DIY answers are not allowed

DIY = Do It Yourself

Call a pro before you hurt yourself or blow your house off the ground

[amd]

Make sure that the combustion air intake isn't blocked.

Your furnace was manufactured in 1994 so it would be wise to get the whole unit cleaned and inspected - there are a few pictures of prematurely cracked G26 heat exchangers in the wall of shame section.

[ffresh]

Make sure that the combustion air intake isn't blocked.

Your furnace was manufactured in 1994 so it would be wise to get the whole unit cleaned and inspected - there are a few pictures of prematurely cracked G26 heat exchangers in the wall of shame section.

AMD
Thank you for, so far, the only civil response, devoid of any arrogant underlying tones. One quick quip explains what the acronym DIY means - as though anyone over the age of 10 doesn't know what it stands for, then continues with an arrogant retort. I had stated "I am not sure what you mean by DIY answers are not allowed", not that I didn't know what the acronym DIY meant. Perhaps this forum is solely for "professionals" and that is OK by me - I'll go elsewhere. But, at the ripe age of 61 and having been fixing things for most of my life that most "professionals" wouldn't even contemplate tackling, I think I've paid my dues! I have seen the pictures of the cracked HXs on the G26s. I am going to use my borescope to inspect the interior to the extent that any "professional" could without total disassembly. This unit is in a home that I currently have on the market. I will lose several thousand dollars in the eventual transaction due to the real estate situation. Being an honest individual, however, I just want to ensure that everything is copasetic with the furnace. I have "cut my teeth" on a Amana HTM unit that I have kept running smoothly for 20 years. A friend of mine that has owned a HVAC business for 30 years has remarked that I know more about that unit than any of his technicians (I have partially rebuilt it over the years). I love the unit and have many spare parts - I hope to keep it running for, at least, a few more years. I relate this, not to brag, but merely to paint the picture that I am not some ignoramus who just fell off the turnip truck and removed the access panel from my furnace for the very first time.
Some folks are tenacious in guarding their "perceived" territory and want to chase off any newcomers - that is a shame. The goal should be to spread knowledge and welcome all newbies who show an interest. If I'm in the wrong place please let me know. I'll leave and seek advice elsewhere. Those who wish only to POUNCE upon an "intruder" presumptuous enough to ask a question, need not bother to reply - THANK YOU!

P.S. I have previously ensured that the intake is open and without obstruction

[Juleous]

If you were so smart you would have read the forum rules and would know that we can not post DIY answers. I knew right away you were not a pro by your first post so that makes it a DIY answer. I am not arrogant they will ban me for answering your question.

[ffresh]

If you were so smart you would have read the forum rules and would know that we can not post DIY answers. I knew right away you were not a pro by your first post so that makes it a DIY answer. I am not arrogant they will ban me for answering your question.

Juleous,
Actually, and to my embarrassment, I wasn't reacting to your post but to Stebs. I'm sorry if I offended you, it was not my intent. I did ask you what you meant by DIY answers are not allowed, however. So, I guess that the answer to my, admittedly, lengthy post is that this forum is for professionals and questions from newbies are non gratis - is this correct?

P.S. I was not trying to paint myself as "so smart". I'm sure that everyone on this forum has read the EULA for every piece of software that they have ever installed onto their computer and that I am the only culprit That said ... am I in the wrong place to get my question answered?

[johnsonha]

while i applaud your experience, i do have to agree with the other guys, this is a job for a truly trained professional. you are talking about a lot of gas, not something to take lightly

[amd]

Well this board isn't really for DIY 'ers because people who shouldn't be touching HVAC equipment could obtain just enough information to screw up and get hurt. (Protecting the industry is most likely also a factor, but I won't go there )

[ffresh]

while i applaud your experience, i do have to agree with the other guys, this is a job for a truly trained professional. you are talking about a lot of gas, not something to take lightly

Johnsonha
Thank you for your civil reply and I appreciate your caveat. I would still appreciate, though, if someone would just correct any misconception on my part and just say "this forum is for professionals only; others are not welcome". NO hard feelings. I don't want to waste my time any more than I want to waste yours!

AMD Thanks again (just got your post); and from your response, I am barking up the wrong tree. Once again, I appreciate your civility. God bless and I shall seek an answer elsewhere.

[johnsonha]

FFRESH, this forumn is a great place for ALL people to get ADVICE. My ADVICE is let the pros handle this one.

[ffresh]

FFRESH, this forumn is a great place for ALL people to get ADVICE. My ADVICE is let the pros handle this one.

Well ... I somewhat agree. Reading through the posts, one can, perhaps, glean some knowledge in an indirect fashion, assuming a "pro" has posted some experience that he has had or unusual encounter that he wishes to relate, and the reader has unlimited time at his disposal (we should all be so lucky ) Other than that, however, it is not, evidently, within the realm of the DIYer to ask a question on this forum and get an inciteful answer to a problem, other than "let the pros handle this one" (no disrespect intended). Thanks anyway though for your interest. I'll be retreating to the forum at REMOVED LINK! to ask my question.

Post edit

Anecdote (the following from the forum rules): Just for the record, I am a contractor
1. Who Is Welcome Here?

Anyone in the HVAC industry and home or building owners with HVAC/R concerns and other polite and fun people that are willing to contribute.

HVAC Pros, please note; home owners are welcome to ask questions here, if you do not wish to be helpful that is fine but do not intimidate, obstruct or criticize

This site is for industry professionals and folks seeking HVAC/R advice and knowledge. Please do not ask for step by step instructions on purchasing, installing or repairing your own equipment

I don't believe that I ever asked for step by step instructions