Napoleon manuals & error codes
Napoleon High Definition 81: Common Problems, When to Call a Tech and Manual
This page covers the current Napoleon High Definition 81 (HD81) gas fireplace.
What this unit is
The High Definition 81 is a current Napoleon direct vent gas fireplace for natural gas or propane. Earlier HD81 versions with log, glass or rock burners have their own manuals on Napoleon's older manual index, so check your model number carefully.
Error codes
We haven't confirmed which error codes or diagnostic lights this model uses yet, so we're not listing any here rather than guess. Your owner's or installation manual (linked below) is the right place to check what a flashing light or code means on your unit.
Common problems
- The remote stops working. Put fresh batteries in the remote first. It's the most common, and the cheapest, fix.
- It won't light, or it lights and then goes out. Turn it off, wait a moment and try once more. If it still won't stay lit, stop there. Repeated tries won't fix it, and the cause usually needs hands-on diagnosis.
- You're not sure what a flashing light means. Look it up in the manual linked below before you try anything else.
When to call a tech
- Any gas smell (leave first, then call your gas supplier from outside)
- It won't light or stay lit after one retry
- The glass is cracked, or you notice unusual noises, soot or a strange smell when it runs
Official manuals
Napoleon hosts these manuals on its own site. Check that the model number on your rating plate matches before you rely on one.
- High Definition 81, current (HD81NT-1, propane HD81PT-1), installation and operation manual: official manual
Still stuck? Book a $49 video call
A real fireplace tech can look at your Napoleon High Definition 81 with you over live video. A Quick Fix call is $49 for up to 15 minutes, and you see the price before you book.
Book a video call or find a local pro
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Tech Brain check 2026-11-02: link resolves (HTTP 200 PDF) to Napoleon High Definition 81 installation and operation manual W415-2362 rev A (cover: HD81NT-1, propane HD81PT-1; direct vent). KB copy: tech-brain/sources/napoleon-hd81-W415-2362.pdf.