Napoleon S9 door tuning

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brightblack123

New Member
Nov 6, 2025
2
Upstate NY
Hello,

New poster here. Good to meet you.

We have a Napoleon S9. I have only had this stove since acquiring our house in January and we are planning to burn in earnest this coming season. I went through everything (replaced some bricks, and did the dollar test on the door which had a large gap). I decided to replace the gasket (1/2" per Napoleon specs), but I am still having trouble getting the door fully tight all around. There is nothing in the manual regarding any kind of latch adjustments. Is it possible that the latch has worn down and that is preventing me from closing it tightly? Am I missing anything here? Any S9 owners, I'd love any suggestions.

Thank you!
 
Thank you Bob,

I think I may have found the culprit here. The latch plate mounting screw holes are countersunk which means it should have flat head machine screws, this one was likely swapped by the previous owner and they used round head screws. What happens here (I believe) is that the round head screws from the latch plate (door) meet the round head screws (stove body) which prevents the door from getting 100% tight.

In a quick fix, I've picked up some flat head metric screws this morning to swap out on the existing latch plate (door), and have ordered a replacement latch plate and latch.

I would still like any info, from other S9 owners on any tips and tricks to level or tweak the door if possible.

I'm grateful for this forum, my apologies for not investigating this issue further.


[Hearth.com] Napoleon S9 door tuning[Hearth.com] Napoleon S9 door tuning[Hearth.com] Napoleon S9 door tuning
 
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Thank you Bob,

I think I may have found the culprit here. The latch plate mounting screw holes are countersunk which means it should have flat head machine screws, this one was likely swapped by the previous owner and they used round head screws. What happens here (I believe) is that the round head screws from the latch plate (door) meet the round head screws (stove body) which prevents the door from getting 100% tight.

In a quick fix, I've picked up some flat head metric screws this morning to swap out on the existing latch plate (door), and have ordered a replacement latch plate and latch.

I would still like any info, from other S9 owners on any tips and tricks to level or tweak the door if possible.

I'm grateful for this forum, my apologies for not investigating this issue further.


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sounds and looks like you nailed it! Well done... Please update after you make the fix as it's good info in case someone else has a similar issue