Unit functions perfectly if the ambient temp is less than 80F.
It was woking fine for 3+ months, and it’s only few days when temperature started to raise during the sunny days (Florida). Once room temp gets over 80F (never over 81F), it locks up in an hour or two.
Also it does have the internal fan for sure.
SKU: XD4-240
My guess is that I would have to remove labels, unscrew the mainboard and see if any thermal compound needs refreshing. The upper plastic part is removable with 4 unsealed screws and there is a fan in the center of the unit.

