How to Reset a Rinnai Tankless Water Heater (In Simple Steps)

Can I reset my Rinnai tankless water heater without a controller? Yes, you can reset your Rinnai tankless water heater even if it doesn't have a controller. To reset the unit without a controller, follow these steps: 1. Turn off the power supply to the unit. 2. Wait for at least 10 seconds. 3. Restore power to the unit by turning it back on.. Hard water must be treated to prevent scale build-up or damage to the heat exchanger. The above codes will lock the water heater out, requiring a reset function. See below how to reset. •To operate the water heater temporarily until the heat exchanger can be flushed, push the on/off button on temperature controller five times.

Is your tankless water heater frozen, and you are looking for a complete guide on how to thaw a frozen tankless water heater? You have come to the right place. Tankless devices provide you with a limitless warm water supply in frosty weather. In winters, the units themselves don't need any protection from freezing as…. Struggling with your Rinnai tankless water heater? Watch our step-by-step tutorial to learn how to reset your water heater and troubleshoot common error code.