Although most gas appliances are not sensitive to slight gas pressure variations, performance of a gas refrigerator is very dependant upon the correct gas pressure. Checking the gas pressure should always be a part of a any gas fridge maintenance program or gas refrigerator repair. We suggest to have your gas supplier check your gas pressure or do it yourself with the below instructions.
Approximately 60" of clear 3/8" flexible plastic (vinyl) tubing.
Staples or tie straps to hold tubing to back plate.
6" x 16" wood board or sheet metal.
1.) Attach the plastic tubing to the back board using staples or tie straps in a "U" shape 12" to 14" in both directions as per the below drawing.
2.) At about the midway point of the tubing, mark the back board with a zero location.
3.) From the zero location, place marks every 1/2" above and below. Number the marks every one inch. Place a target arrow mark at 5 1/2" on top and bottom. This target will equal 11 inches of water column (W.C.).