This is a 2 part review. The original replacement in 2008 of our 20 year old water heater with a tankless was well done and painless.
4 years later the tankless would shut down but would restart after a reset. A call to Ron Curtis got me connected to Rheem tech support that told me an extended warranty on the PC board with parts and labor was available. Rheem sent me the PC board overnight. Ron gave me a suggestion how to do it myself so I would not have to wait for a tech to show up and install the PC board. Ron's suggestion worked great and I was done 1 hour after FED EX dropped off the unit.
Another plumbing company offered to analysis the problem for $200 dollars and then order the parts.
Thanks Ron for everyting.