I have an SH-09 Seisco tankless mini boiler for my radiant floor heat. It has been working fine for the last 5 years until today. I turned it on for the first time this season and it's making a clicking noise. It still heats, but it appears one of the four relays on the circuit board is constantly clicking, about once or twice every few seconds. A replacement circuit board is around $200, but I'm looking for ideas before I start throwing parts at it.
Seisco tankless problem
- Thread starter Kapt
- Start date