The cooling unit is a sealed system on the back of the fridge.Heat is applied by a 12v/240v element or a gas burner. This has a reaction with the ammonia and hydrogen in the unit.
It rises in the unit and causes the refrigerant to cool the ice box first.
We know that the unit works beacuse its good omn electric.
The problem here is that there isnt enough heat being supplied when its running on gas.
This will be due to the jet and burner. You should take it back and get the guy o replace these two parts.
Over time, the hole in the jet can become corroded and there is no way to be able to "clean" it, it has to be replaced.
If you need more help, please just ask me
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