Got the infamous icemaker freezing up problem so common to Frigidaire Gallery and Professional series refrigerators. I was also only getting the "OP" code on the diagnostic test 26, so I determined the defrost heater and/or the thermostat was probably bad. So, I went ahead and replaced both of them, as well as installed the updated air handler housing kit. What I didn't realize from the parts pictures was that the air handler kit was not only updated foam replacements, but it was also a replacement of the housing unit itself. Had to move the fan, crushed ice solenoid, and auger motor from the old unit to the new, but the instructions were very well written and easy to follow. Took a little longer than I expected, but no big deal. Have had ice production as normal for more than a week, so very happy!