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. I checked the gas, and it's on and functioning. Is the power supply to the controller a … read more Rinnai Tankless Water Heater Troubleshooting Manual WARNING There are a number of live tests that are required when fault finding this product. Extreme care should be used at all times to avoid contact with energized components inside the furnace. Hi. Contractor's Assistant: ... We have a tankless Rinnai hot water heater. After loosing power for a week, it won't come back on. There is no power to the controller. Can a Rinnai Tankless Water Heater be installed in a mobile home? Hubert Miles. Hi. I have 3 rinnai tankless water heaters and no hot water. Please consider the following Rinnai tankless water heater problems. No hot water is one of the most common problems in water heating systems. ... control•r™ - What happens when the power goes out? I haven't found a schematic yet. Fixing tankless water heater problems No hot water. They offer virtually unlimited, well-heated water for hour-long showers, many daily loads of laundry, and even outdoor hot water uses. control•r™ - If I swap out the module for any reason, do I need to re-pair the Push Button or Motion Sensor? 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 electric plug works,but there is not lights on the controller.Why? Make sure that the shut-off valve, is not closed. have powered off at the power point. 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. 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 … I'm an appliance tech and am helping my mom with her Rinnai R85 tankless water heater. The first things you should check are the correct supply of electricity, water, and gas to the water heater. I'm an appliance tech and am helping my mom with her Rinnai R85 tankless water heater. I'm a licensed Home Inspector, Certified Master Inspector (CMI), and FHA 203k Consultant. 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. Rinnai water heaters; Now to be sure, Rinnai tankless water heaters can be a gratifying investment in your home’s overall comfort. 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