I have a question about TEV (TXV) performance. As we know, TEVís are sized by tons, selected based on application, they come external or internal equalized, attempts to maintain superheat, and matched bulb with known refrigerant. My question is what happens with an external equalizer TEVís bulb begins to since suction line temperatures in the range of a refrigerator rather than a high temperature A/C coil? Does the TEV lose control and begin to hunt? Does the TEV shut down, restrict completely, and then fails to pull back out because coil eventually freezes up?
I am beginning to face more and more TEVís 13 SEER systems whose has poor airflow designs, bad duct layout, and restricted airflows. Therefore, the poor airflow is leading to low superheat and TEVís seemly acting squirrelly. Have anyone faced these problems. Are you finding your TEVís losing control or not?