Since the refrigerant filter drier plays a key role in providing clean, moisture free liquid refrigerant for the TXV, it’s important to look out for blockage in the system. If clogged debris is reducing pressure and flow within the TXV, the temperature will drop and cause ice to form on your evaporator coil.

What are the symptoms of a bad TXV?

• Low evaporator (suction) pressure;
• High evaporator and compressor superheats;
• Low compressor amp draw;
• Short-cycling on the low-pressure control;
• Somewhat high discharge temperature;
• Low condensing (head) pressure;
• Low condenser split; and.

What happens if TXV valve goes bad?

The symptoms are low suction, normal subcooling, and high superheat when a TXV fails “shut,” but there are some other issues to watch for that can actually result in overfeeding the coil.…