Heatilator Model #NDV4236I flame keeps dyeing down

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Braz60

New Member
Nov 14, 2022
1
Mundelein IL
I am a newbie to fireplaces but pretty handy when given good directions. I have a Heatilator Model #NDV4236I when I flip the wall switch on, the fireplace lights no problem
but after a few minutes the flame dies down then comes back up. Any ideas what could be causing this and what the solution might be.
 
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