Product review (5 stars): Perfect replacement for inverter module on GE Monogram fridge
Worked perfectly to get my GE monogram ZISS420 built in fridge back in service. To confirm it is the inverter that went bad, Just test J15 on the control board for the presence of 4-6 VDC and test the three terminals on the compressor windings for continuity which is usually around 7 ohms each. If those two checks are good, then it is a good bet it is the inverter module.

Also add that the box included the necessary adapter jumper cable to allow the inverter signal input to connect to the signal cable from the control board (J15). Some other vendor replacement modules require you to reuse the old one.