UPDATE?: I finally found the culprit this Morning concerning the green light that wasn’t lighting when pressing the RED button on the mainboard. I decided to chase all the air from the gaz lines by forcing the furnace to work first. Next, I vacuummed with a shopvac the chimney outside ‘cause I suspected a spider’s web Inside. Well, after those two procédures, I tried to start the fridge on gas again and it worked !!! Marvelous.....see the results !!!