Sry i dont have much to work with at this point but i am looking for a little help before i go back out to this house. Was already dark when i got there so i wasnt going to tear the unit down at night.
System is a one year old mini split heatpump and is frosting from the liquid line king valve toward the evap coil. It is a 410-A system. Board on the condenser was flashing an overheat code for the compressor. Condensor discharge air was equal to ambient outdoor temp. I have no experience with mini splits but went to put my guages on it and only the suction side king valve had a service port which i found odd considering it is a 410-a system.
Main thing i would like to know is, would a stuck reversing valve cause this problem?
According to the home owner the system cooled great all last summer and the heatpump did fine over the winter but has not cooled well this entire spring. thx in advance for any help.