I had tankless water heater issue and I used my home warranty to troubleshoot, American Home Shield. AHS sent a contractor and worked on it for 30 mins and then said he would not be able to work on it because he was not familiar with it.
Lamont from LX Plumbing was sent as the second contractor and was amazing. He came to check it out and worked on it for a few hours, and realized we needed a new unit. He put in a request for a new unit, escalated the issue, and scheduled an install date once received. He worked on it for longer than anticipated but he was very professional, communicated well, and had a pleasant experience with Lamont.
My unit is working perfectly and I am happy that we found a great plumber that completed a very difficult install from start to finish.