My congratulations on your analysis. Your control was 15 minutes, but the issue mentions parking for 30 - 60 minutes. The parking is also at idle. I appreciate it's more awkward to leave at idle for 60 minutes and see what happens, but perhaps (a) idle for 15 minutes with the bonnet closed ... does the blower stay on? (b) after parking open the bonnet and leave it open ... does the blower function on restarting the engine?.
We've had mid-30's here in the UK for some weeks now, and I've not experienced the issue, nor heard of anyone else in the UK experiencing the issue. I doubt therefore that there would be an official factory solution from MMC, but I hope to be proved wrong by others on the forum!
