Dear Marvin,
Yesterday, I opened the inside evaporator panel and I see some thick black plastic cover at the start of evaporator line was melted and a bit deposited on the evaporator cooling fins. To say evaporator line starts with thick tube and ends with very thin (copper) tube. On the thinner part there was a huge black plastic wrap which is melted. I wish i could sent you the photo. Near the drain out area at the bottom i see black spot as well, possibly because of heater heating longer??
Rest of the panel looks okay. Seems only black plastic thing is only melted leaving the end of evaporator line naked.
What can be done from here? do you expect a leakage? Is it important to make black plastic coating again? Is the defrost sensor broken and it was continous on heating mode?
For me it is a mystery now. Possible to send you somehow photos?
Thanks again, Ankit.