Had a thought earlier today, could the unit still be under charged? i was told it was swapped in late December so outside air temp would be low, would the condenser fan need to be running high when charging as i know you have to do this with some cellar coolers to ensure correct charge. I am just wondering if that's whats required and whoever installed didn't do this. I found a manual online but there is no mention to do this but i know when i've been to it, it doesn't run at full speed (likely due to low air temp)....would turning the fan speed up and charging to a full sight glass (if required) create the potential for over charging?