I have two galaxy hydros to look at for someone next week. Last time (6 months ago) I was there I was told they were having multiple problems. When I started to dig I found others complaining about contactors being undersized. The contactors at this site were replaced and their trouble went away. At least with the control side of their issues. The job is a duplex less then two years old. As the one unit runs up & down oil squirts out where it appears to be seamed together. The owner said the unit was repaired.