Sorry for the delay in responding. Thanks for the input, everybody. The problem I was concerned about had to do with a rather sudden increase in temperature in the lower unit of the fridge. It had been working really good for quite a while and about 2 months ago, it started heating up, reaching as much as 60F sometimes. Anyway, I removed and cleaned the gas orifice and burner, thinking this would help. No joy. The freezer stayed right around 5-6 degrees, but lower unit was heating up. We had a spell of hot weather so I thought maybe lack of air flow. I installed a new circulating fan, replacing the one already there. No joy. That's when I started thinking about adding another vent.
Fast forward to today. I installed a new thermister early this morning and still no help. After watching a number of Youtube videos, I decided to try running the unit on 120V. Had been using propane all along. (Flame looked good). Lower unit started out at around 50 degrees early afternoon. Now, at 8:40 pm, it is sitting at 28 degrees!
I've decided to replace the orifice and burner which should be here Monday. I guess, the flame I was seeing was not enough to do the trick. Even though I had cleaned the orifice and burner, I guess 18 years has taken it's toll. I had never used the 120v system as the propane has always worked for us. Didn't know whhat to expect. But, I'm a happy camper now.
Again, thanks for the input.
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