What causes the Evaporator to freeze on an Air conditioning system.?
This is a common problem with air conditioning system that has many causes. Determining the cause is the first step. An evaporator on an Air conditioning system normally runs 40-45°F or 4-7°C when the system is running properly. If the refrigerant charge is low, or if the refrigerant feed to the evaporator is reduce, or the air flow is reduce then freezing will occur. Any of these parameters or any combination of them will cause the evaporator temperature to drop. Once the evaporator reaches 32°F or 0°C the freezing begins as the ice forms on the coil, the air flow is reduce and accelerates the freeze process. Clip on Freeze Thermostat! Common causes are: * Low Ambient, Running when the outdoor temperature is too low. Below 65°F * Low refrigerant charge * Under sized liquid line * Blocked capillary tube * Indoor Temperature too low Below 72°F * Over sized Compressor * Blocked Liquid Line Filter Low AmbientThe mechanical refrigeration system used in air conditioning equipment is design
