I'm here on temp. duty and am working on a Trane unit that is constantly freezing up. The unit was poorly cared for by the previous tenants. Just have a few questions.
According to the unit manual, digit 9 of the model number indicates the unit had a ReliaTel Microprocessor. I say "had" because it was removed by a previous individual and never replaced. The unit does run but freezes up. With the Microprocessor missing, how much will this affect unit performance?
Also digit 22 of the model number indicates the unit has a Standard Refrigeration Coil with no expansion valve. Does this mean the unit has an orfice to meter the gas? If not, how is the refrigerant metered through the evap? Digit 23 indicates No Refrigeration Control.