I was Dispatched to a no cooling Call. Upon arrival I found the West System very low on Refrigerant R-22. I cleaned and serviced all three Systems. After servicing I rechecked all 3-Systems. The West System has a defective TXV. The TXV is metering to hard and causing depressed Suction and elevated Head Pressure. I can charge the System but it is extremely sluggish. The TXV is not metering correctly but it is working. At least in the short term. the Evaporator coil also has a leak or leaks. The West unit may freeze again. The TXV is keeping the pressure and temperature just above freezing. I will give Kevin a call and ask him to give an estimate.