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Chad MasonAug 17, 2025
What to do if Noritz EZTR40 Water Heater detects scale build-up?
- SSara LunaAug 17, 2025
If your Noritz Water Heater detects scale build-up in the Heat Exchanger, it needs to be flushed to remove the scale.
What to do if Noritz EZTR40 Water Heater detects scale build-up?
If your Noritz Water Heater detects scale build-up in the Heat Exchanger, it needs to be flushed to remove the scale.
How to fix fluctuations in hot water temperatures in my Noritz Water Heater?
If you notice fluctuations in your Noritz Water Heater's hot water temperatures, try cleaning the water filter to remove any debris.
Why has the amount of hot water decreased in my Noritz EZTR40 Water Heater?
If the amount of hot water available from your Noritz Water Heater has decreased, the water filter may be clogged.
How to fix ignition error on Noritz EZTR40 Water Heater?
If you are experiencing an ignition error with your Noritz Water Heater, check if the gas valve is open. Unplug the unit or turn it off using the optional remote controller, open a hot water fixture, and then turn the unit back on. If the error doesn't return, the problem is resolved.
What to do if Noritz EZTR40 Water Heater has abnormal combustion due to clogged air inlet filter?
If your Noritz Water Heater is experiencing abnormal combustion due to a clogged air inlet filter, clean the air inlet filter.
What to do if the light on the power button does not come on on Noritz EZTR40?
If the light on the power button of your Noritz Water Heater does not come on, check for a power failure and ensure the power is connected properly.
Why does white smoke come out of the exhaust vent on a cold day from Noritz EZTR40 Water Heater?
If you notice white smoke coming out of the exhaust vent of your Noritz Water Heater on a cold day, this is normal. The white smoke is actually steam.
Why is the hot water turbid from my Noritz Water Heater?
If the hot water from your Noritz Water Heater is turbid, this is harmless. Small bubbles appear as the air in the water is heated and depressurized rapidly to atmospheric pressure.
Why does the water appear blue from my Noritz EZTR40?
If the water from your Noritz Water Heater appears blue, this coloration may be from small traces of copper ion contained in the water. However, there are no problems concerning health.
Why Noritz Water Heater does not fire when water is flowing?
If your Noritz Water Heater does not fire when water is flowing due to high supply water temperature, the unit will not fire because it will overheat the outlet water.
Explains symbols indicating danger levels and operational icons for safe use.
Covers critical safety rules for installation, operation, and surrounding environment.
Details precautions for water usage, unit cleaning, water quality impact, and freezing.
Identifies key parts of the water heater unit for user understanding.
Explains the unit's display, including normal status and error code indications.
Outlines the essential steps to prepare the water heater for its first use after installation.
Guides users on operating the water heater directly without a remote controller.
Introduces the optional remote controller, its buttons, indicators, and basic display.
Details how to set the desired water temperature using the remote controller.
Covers muting sounds and adjusting maximum output temperature via the remote.
Explains how to set and use the flow meter alarm feature for volume control.
Explains automatic freeze prevention and measures for extreme cold, including unplugging the unit.
Provides steps to drain the unit for storage and restart it after freezing protection.
Lists essential components and areas to inspect regularly for proper operation and safety.
Explains how to clean the filter in the water drain valve to ensure smooth operation.
Discusses the impact of water quality, scale, and recommended treatments for warranty.
Explains how to identify and interpret error codes and unit operational issues.
Addresses common problems during initial setup and incorrect hot water temperatures.
Details troubleshooting for water being too hot, cold, or inconsistent flow.
Covers troubleshooting for inconsistent or decreased amounts of available hot water.
Covers problems with the remote controller and interpreting unit operational sounds.
Addresses other operational issues like the heater stopping, turbid water, or blue water.
Guides on how to request service, warranty details, and part availability.
Explains the process, requirements, and safety warnings for converting the unit between gas types.
Provides detailed technical specifications and performance metrics for the water heater model.
General| Type | Tankless |
|---|---|
| Heating Capacity | 6.6 GPM |
| Dimensions | 14.5 x 16.5 x 26.5 inches |
| Weight | 38 lbs |
| Warranty | 12 years on heat exchanger, 5 years on parts |
| Category | Residential |
| Energy Factor | 0.82 |
| Maximum Flow Rate | 6.6 GPM |
| Voltage | 120 V |
| Venting Type | Direct Vent |
| Fuel Type | Natural Gas |
| Energy Efficiency | 0.82 |
| Gas Type | Natural Gas |
| Maximum BTU | 199, 000 BTU |
