only max ac

[snoman6115]

ok so i went to the local auto shop today and got my free ac check, i did the blend door fix a week ago and it fixed it for a day not it wont blow cold on a/c. if the switch is ont he cold side and i turn on max i ahve to switch it over to heat then bakc to cold and it blows good, but only on max. anyone got an idea? o ya low side was 25 and high was 175 and the tech said everything else seemed good. blew 36 deg out the center