We purchased a Rinnai Direct Vent Wall Furnace for our sunroom in 2008. During the winter season, when the unit was in use, we began to experience problems with the unit. A sequence of lights would blink across the control panel and we would have to restart the unit. We had several visits with various service technicians, who specifically service Rinnai products, but did not seem to know what the blinking panel meant. Each time various installations and upgrades were completed, but the original problem was only temporarily solved and never... read full review »