Today I arrived at Julie and Kyle Slagle home with a frozen line set. I checked pressures after i seen the pressure and temperatures it was low on refrigerant. I check king valve was closed. I checked the TXV Metering device that was stuck to flu pipe. I added one pound of refrigerant to unit after unit was unfrozen. I spoke with Mrs Slagle about the TXV meter and office will reach out to Mrs Slagle about the warranty on the parts.