I have an EKO 25 boiler for the 5th burning season now. The controller started acting funny at the start of the 3rd year but it wasn't too bad. The 4th year it started acting very strange and I tried to fix it but I believe I ruined it somehow. I talked to Mark at Ahona and he sold me a new controller that was not O.E. The new controller is made in New York . Although the parts are most likely from China. It can be serviced here in New York. To anyone who is looking into a new controller, this seems well made and operates similar to the original. It does have many more options that I didn't need. It was a steep price of 485 after shipping though.