What did the repair guy fix? I think that would be a good lead.
Fuzz's idea of airflow is a good one.
Another thing I'd look into is the light. If it's an incandescent bulb, it could be heating up your fridge. I had a recent issue where something went wrong with the light cable in an older LG fridge that came with the house I bought. The fridge light never turned off when the doors were closed. I only found out when my wife complained that the light cover fell off and the fridge was quite warm at the top. I brushed it off for a day or so thinking she carelessly smacked it with some groceries. When I inspected it, I realized the dual incandescent lights bulbs (within spec) weren't turning off and were hot enough to warp/bubble the thick plastic light cover until it fell off. The surrounding plastic was not unaffected either.
Not saying this is specifically your issue, but for a few bucks it doesn't hurt to swap to LED light for less energy usage and less heat anyways.
I'm still debating whether to replace my fridge immediately or Macguyer some battery powered motion sensing light inside the fridge to delay the replacement. I'm not paying an appliance repair guy a few hundred bucks for something like this.
But damn, if I hadn't found out this issue and went on vacation or something, spoiled food would have been the least of my worries. That situation I had was a full on fire hazard.
I've never seen this happen before.
This happened within a few weeks of moving in. Coincidentally, the garborator which worked fine before stopped working. The garborator looks like it's at least a decade or two old though. The Fridge looks like it's like 5 years at worst. I need to see whether the garb unit is reset/tripped/jammed before considering to replace it. For those who have done this, is this an easy swap? Should I do this myself or procure the parts and pay a contractor $50 to install it?
Note: I'm pretty darn good at IKEA furniture capability, but quite a newbie/amateur for the handyman stuff but willing to learn.