Please note, I am not appliance tech, and I may not be doing things exactly the way a real appliance tech would, but I am open to suggestions on how to better perform my job in cases like this.
When I got there this morning I asked the customer how everything was and she said now the freezer seems to be thawing. I opened the freezer door and I could see frost on the lower panel that sits in front of the evaporator. That was kind of tell tale for me. I removed three baskets and took the two screws out and removed the plastic upper and lower metal panel and sure enough, the evap was blocked with frost. I turned the thermostat down to "off" so the fan would shut off and used my heatgun and defrosted the coil. While I was in the middle of that the customer stated that the flap to her ice dispenser had been stuck open for weeks and just had that fixed on the previous Saturday and it was shortly after this she noticed the problem with rising temps(not sure why she called me for this when she called someone else for that). She asked if the open flap could have caused it, since she said there was frost forming at the opening. I told her I wasn't 100% sure, but it would be the same as having the freezer door cracked open and you could get excess moisture forming. After thawing the coil I checked to make sure the heater ohmed out and it did. I'm thinking I should have checked the defrost thermostat, but after the defrosting, it would have been open anyway.
At this point I let her know that it might be a defrosting problem and I explained how it worked. I told her if the problem occurred again, she might be looking at a new defrost control...
I also noticed on the left side near the bottom where the heater sits, it was up against the aluminum splash guard and it looks like it was heating it enough that it actually discolored the plastic and cracked it from the heat right above where the aluminum stopped.
I did not get a chance to read the defrost control yet in the manual, so when/if this problem happens again, I will know how much of a pain it will be to test the control.
That's it for now!!