![]() ![]() Turns out, every tankless water heater comes with a flow sensor. Guess what, not turning on the water heater means no hot water. Consequently, you can’t turn the unit on. Sufficient water will not flow to the unit. If you don’t fully open the water supply valve. And this is an intrinsic characteristic of tankless water. In Noritz, the minimum water flow rate is 0.5 GPM. Tankless water heaters, whether it’s from Noritz or Rinnai, won’t start if there is not enough water flow or the water supply at the unit is cut off. The water supply valve will be inline just like the following picture if when you fully turn it on: Just take your eyes on the inlet water supply valve and ensure you fully open it not partially. Open both the gas valve and the water supply valve fully and it will solve the issue. ![]() And the culprit behind getting interrupted gas & water supply is to not fully open the gas valve and the water supply valve. If your Noritz water heater doesn’t receive uninterrupted gas and water supply, it will never heat the water. Sustained or continuous flow of water and gas to the unit is a must. Partially Opened Gas And Water Supply Valves End-Note Noritz Tankless Water Heater No Hot Water įrom this chapter, you can discover the solutions that will help you fix the ‘no hot water’ problem.Noritz Tankless Water Heater No Hot Water.Throughout this article, I will walk you through each of those culprits and let you know how to fix them. Partially open the gas and water supply valves.Your Noritz Tankless Water Heater will produce no hot water due to the following reasons: ![]()
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