We have a customer that has an Ameristar Heat pump. Outdoor M/N 2A6B0024A1000AB Indoor air handler M/N TWG025A140B1. This is installed in a condo with the air handler on the 5th floor and the outdoor unit on the 12th.(roof) All of the units were installed with pistons as metering devices. There have been a number of problems including leaks and dirty indoor coils. Another company came out before we did and said the system needed a TXV installed and that would take care of it. My question is will it really make a difference? There are about 110 units here and most if not all of them have pistons. We had to clean drywall from the coil,and do a leak check and repair.
This customer is asking why we are not recomending a TXV also.