Thermal solar installed by Simply Solar company who are no longer in business. Have had difficulty finding anyone prepared to service it. Persistent cold calls from different names, claiming to have taken over from Simply Solar and telling me that my system needs servicing every year or every two years or complete antifreeze needs replacing. Finally found someone from Coventry to carry out a service two years ago (Simon Coleman at "Greentastic"). I think he did a good job including a total replacement of Heat Transfer fluid. Recently however, he has contacted me again claiming that after two years my system is again in need of a complete service and wants to charge £270. on questioning the cost, he clams that he uses a very high grade fluid and that this needs replacing every two years. well I am a pensioner but not stupid and although heartily tired of various companies trying to sell me electricity saving solar products, I persevere searching the internet for the truth about servicing Thermal Solar and have now found YOU GEN and hoping at last to get some honest help.