As we discuss in this brief, the administrationâs reports to the court do not preclude the Legislature from assessing the measures identified by the administration and considering its own strategy for compliance with the court ruling based on its priorities.
The two most common causes of low head pressure at an air conditioner or heat pump compressor motor are: 1  Refrigerant under-charge, due to a refrigerant leak or improper charge.  TXV (TEV) malfunction, over-metering refrigerant.
The down side of this however is the reduction in ventilation and any moisture build-up as a result of this has nowhere to go. What then happens is that any excess moisture will gather in the colder areas i.e.; windows, seams & corners, cupboards etc. Ultimately, lack of ventilation is the main cause.