Customer states tankless needs to be unplugged and plugged back in almost every morning or the unit will not fire. We ran water for a half hour but no trouble codes appeared and the unit operated properly while we were onsite. The customer mentioned it had been a couple years since the unit was last flushed and asked about having it flushed. While onsite we found that the check valve on the cold supply, and hot water return line are both leaking. We found that there is a brass sharkbite fitting on the condensate line. Tankless condensation is acidic and routinely eats away at brass fittings. This fitting was installed in such a manner that it prevents removal of the fitting. This estimate includes descaling the unit, but we make no guarantees that flushing the unit will restore proper operation. Work performed: Descaled tankless water heater.