As with anything, I have been and still am in business for 50 Years providing Sales, Installation and service to everything that I install, I cannot tell you how many " *** " jobs i have seen in the industry, 99 % of the time it is not the equipment, its the installer !!!!!!!!!!! In Geothermal the loop has to be calculated and installed correctly, for that matter even a open loop system has to have the adequate water flow to run within Mfg specifications, if this is not correctly performed upon installation guess what happens over time ? Failure just like an engine without proper lubrication ! User's recommendation: Make sure you the customer get references of past jobs and talk to past homeowners that have used their service.