There is no power to the controller. unfortunately the on demand water heaters will not make hot water without electricity, so if you have no power to that unit you have no hot water. have powered off at control panel, it resets to 50 degrees but when i … I checked the gas, and it's on and functioning. Please consider the following Rinnai tankless water heater problems. I haven't found a schematic yet. Contractor's Assistant: ... We have a tankless Rinnai hot water heater. made no difference. control•r™ - If I swap out the module for any reason, do I need to re-pair the Push Button or Motion Sensor? I've been conducting home inspections for 17 years. Sounds like you still have no power, the rinnai is recommended to have a dedicated circuit, check the panel, or if the the outlet the heater is plugged into is a ground fault protection outlet hit the reset. Extreme care should be used at all times to avoid contact with energized components inside the furnace. The electric plug works,but there is not lights on the controller.Why? After loosing power for a week, it won't come back on. Does Rinnai offer a battery backup system? No hot water is one of the most common problems in water heating systems. have powered off at the power point. When you press the "Priority button", the green light will glow, indicating that the controller is controlling the temperature and that a water heater is ready. Is the power supply to the controller a … Rinnai water heaters; Now to be sure, Rinnai tankless water heaters can be a gratifying investment in your home’s overall comfort. Rinnai water heaters work in the temperature range from 98 F to 140 F, while they come with the factory setting of approximately 120-125 F. The first things you should check are the correct supply of electricity, water, and gas to the water heater. But if you are using the Rinnai Tankless Water Heater, there is a way of a solution to your problems. Is the power supply to the controller a … read more Hubert Miles. ... control•r™ - What happens when the power goes out? Hi. There is no power to the controller. They offer virtually unlimited, well-heated water for hour-long showers, many daily loads of laundry, and even outdoor hot water uses. I have 3 rinnai tankless water heaters and no hot water. I'm an appliance tech and am helping my mom with her Rinnai R85 tankless water heater. Make sure that the shut-off valve, is not closed. Hi. I'm an appliance tech and am helping my mom with her Rinnai R85 tankless water heater. Fixing tankless water heater problems No hot water. Thankfully, most of the Rinnai Tankless Water Heaters come with a control display panel and it exactly shows you what the problem with your Tankless Water Heater is. 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