Well ain't that a bitch. I bought a thermopile (no thermocouple on this unit), igniter and pilot assembly and installed it. The pilot will light (and may have been before, I moved the unit to see better today) but won't stay lit. It looks like the control unit at the cost of $150+. I have a call into the plumber I used when I sold my old house but I suspect I'm going to replace the whole unit. I can't see spending a bunch of money on a builder grade unit with internet reviews giving it another couple of years before more issues.