Refrigeration 101

[Gary]

I first check the delta-T's to confirm adequate airflow through both coils.

Then I check for high subcooling.

Then I check for low superheat.

Then I check for low subcooling.

Then I check the condenser TD to see if the high side is rejecting a heavy heat load.

If the high side is rejecting a heavy load, then the low side must be absorbing a heavy load.

Adjusting a TXV aka TEV is almost always a mistake, especially when the refrigerated space is above design temp.