i was called out to 2x coldrooms with high temps they were both running at 1.5 bar on r134a i blew the condensor out as it was pitted, and left them to settle, after a hour or so there was no change in temp so i rang my colleague who informed me to fill the systems up until the sight glass was clear (is this the correct way) so i done as i was asked and there is still no change in temp anybody got any ideas.