Question about Noritz 7.1 Gpm Natural Ng Gas Tankless Hot Water Heater

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After water to house was shut off, my Noritz tankless water heater is on but won't produce hot water. On the unit, the light indicating that the burner is on stays off now.

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You probably had debris get into the filter or flow sensor when the water was turned back on. I'd recommend checking the filter first and if that doesn't work, call Noritz Tech support to help you with the flow sensor.

the filter is a black plug located on the cold water line (labeled cold on the bottom of the unit). It points torwards the left.

Posted on Jul 01, 2010

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No water flow...no hot water. Flow turbine needs water to turn. NO flow no hot water. Filter clogged?

Posted on May 20, 2010

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Sometimes the hot water just goes cold


Here are a couple things to look for:

1) flashing burner light - a flashing burner light indicates the unit is getting an error code
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3.If none of these resolves your problem, you probably have debris in your flow sensor. Contact Noritz technical support for a walkthrough on removing debris from a flow sensor.

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