thanks for all the help. i fixed a line tap. while working pressure was well below zero, i have topped up to 5psi. current too has increased fro.m 1.8.A to 2.3A and the coil is frosting.there is hardly any space at the bottom to inspect tubing.even the condenser is packed tight at the bottom. moving this ice box is not easy for it's weight.anyway i'll let it run for a day or so and give you a feedback . thanks.