Unplug your machine and allow it to cool down fully before doing this procedure.
1. Remove the front panel of the A53.
2. Remove the fitting pointed out here. You will want to put a towel down underneath the machine as some water will spray out.
3. Move the copper pipe to the side, snip the zip tie attached to it and push the cord down out of the way.
4. Adjust the expansion valve by holding it forward and using the adjustable wrench to turn the lower nut.