Yes, the combustion chamber is meant to be sealed. This is straight from the
horse's mouth (Dometic technical support, I called them). My combustion
chamber had four holes drilled into the bottom by some qualified (?) service
technician during a previous service call sometime in the past. I also found
three flat metal washers sitting in the bottom of the chamber! Needless to
say, I will be doing the service myself, henceforth! Servicing the fridge is
not that difficult.

If you can't locate the clear plastic cylinder for the sight hole, simply
seal the hole in the fridge to prevent cold air from escaping because the
sight hole doesn't work that well anyway. It's no big loss and won't affect
the propane operation.

Roy O.
'87 Westfalia (till death us do part)

>If the "combustion chamber" in the Dometic is supposed to be sealed, how is
>it that you (are supposed to) see the flame through the little hole in the
>left rear floor of the fridge?  Ours is missing what ever is supposed to
>cover the hole.  Would this make any difference in the propane operation?
>Does what ever covers the hole "magnify" the flame so that you see it more
>easily, you have to stand on your head to see it in ours.  If I can't get
>what ever is supposed to be in there, should I block up the hole?
>
>TIA
>
>Wendy & John
>Cape Cod, MA
>
>'85 Westy,   "S-CAPE"
>LiMBO members
>