Hi my friend asked me to recharge his van today ,it had gas in system still but low. So Added small amount in at a time had it running at 30 psi low side, let it run for 10 mins. Noticed low side pipe was normal and high side pipe was cold. And no cold air out of Vents ? I've got hold of a high side fitting will check tomorrow was thinking of reclaiming it all and blowing through with nitrogen then vacing . Has any one come across this before