burning at orifice

[2frosty]

i am working on an Enerco Technical Products vent free radiant space heater.
it is a milivolt system and starts just fine but after a few minutes poof it burns back to the orifice. i checked the ceramic burner panels for cracks or enlarged holes but everything looks ok. usually flame inside the burner means the mixture is moving too fast. cant find any probs with this one. appreciate some help.

[cmtechie]

Did you check the pressure of the gas both in and out?

[coolguysfl]

Sorry Mr. Frosty -- no tech advice from this location. If you're a professional, re-register & you'll find help.

If your not a professional - STOP B4 you hurt somebody & call in local talent.

[2frosty]

yeah im a pro and i logged in like i usually do. the gas pressure is a little low due to the reulator being 25ft in the air and a hot production line beneath it. its been that way since it was installed years ago.