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.
   Loss of coolant  loss of coolant because coolant leaks from anywhere on the cooling system.  Loss of coolant because radiator cap is broken and will cause overheat.  Loss of coolant because radiator cap pressure is less than the required.  Loss of coolant because compression leak in to the cooling system.Loss of coolant because radiator cap is broken and will cause overheat.  Loss of coolant because radiator cap pressure is less than the required.  Loss of coolant because compression leak in to the cooling system.