ballpilk

Hello all,
Lately I ran into a strange issue with my AC system. Usually it works fine, but from time to time it starts to blow hot air inside for a minute or two, making interior hotter than finish sauna, and than it returns to cooling mode and operates as usual. (It's 30*C outside - just for the record)
Another observation that I've made is: when it starts to heat and I turn both temperature knobs to minimum for few seconds, it returns to normal operation immediately. I had my ac system checked and refilled. Connected car to SD and found no errors, both temperature sensors seem to work fine (in sd showed correct interior temp.)
Does anyone have a clue what may cause this strange behawior? which part shall I check next?
Thank you in advance.

Plutoe

There is a lot more you could have done in SD----I'd go back and run a full diagnostics on the AC system---wada you find?

ballpilk

well I did full diagnostic... and it said everything is fine. yet it starts to heat me up from time to time. I ran out of ideas,
sd isn't mine so I cannot take it for a drive.