Hello again, thanks for the information.
While you and I are discussing thus hold off on any changes until after you and I discuss the situation..that way we can go step by step and avoid any complications.
Going to a 13 SEER of the same btu rating will not require you to change the metering orifice on the inside unit... the higher SEER rated units simply run lower head pressures in hot weather is all... and the SEER 10 metering orifice will *generally accommodate that. but we have to check a few things.
I need to know the suction pressure
taken at the condensing unit when the unit has been running for a while and it is between 72 and 74 deg F in the house...I need that pressure reading.
And at the same time I need the head pressure reading, and the outside air temperature at that time.
And...I need to know if the suction line is cool, cold, sweating or icing at the compressor or not.... and if the compressor body has any condensate or ice on it where the suction line attach's, and if the bottom of the crankcase is cool.
That will tell me if the metering device is too large or not, and if the system is flooding liquid back to the compressor or not.... if liquid refrigerant is flooded back to the compressor it will make a rattling noise and damage the compressor over a fairly short period of time... a day or two.
Get me that data, we can go from there.