Recently our 91 940 se was converted to the 134. It was done by a shop that has done many of these. On a long trip the outside temp was in the low 100f range. we were heavily loaded four passengers gear and dog. Every time we wet up a hill the ac and blower stopped. As soon as we resumed downhill it would come back on.

Later that night after things cooled down outside and we were on level ground it seemed to work normal in both regular and aut mode.
Thanks Paul