To Next PageTo Next PageWhy is the water not hot enough in my Navien NPE-210S2 Water Heater?
If the hot water is not hot enough, first check the water heater's temperature setting. Also, check for cross plumbing between the cold and hot water lines.
What to do if the water from my Navien Water Heater faucet is cold?
If the water from your hot water faucet is cold, try these steps: First, clean the cold water inlet filter. Then, fully open the hot water faucet. If an error code is displayed, refer to “5.2 Understanding Error Codes” on page 17.
Why is the water too hot from my Navien NPE-210S2 Water Heater?
If the water is too hot, check the water heater’s temperature setting.
How do I troubleshoot error code E109 on a Navien NPE-210S2 Water Heater?
If you see error code E109, clean the intake air filter.
Why does it take so long for hot water to reach my Navien NPE-210S2 Water Heater fixtures?
If it takes too long for hot water to reach the fixtures, have a contractor install a circulation return line from the farthest faucet back to the water heater.
How to fix Navien Water Heater error code E016?
If you see error code E016, try these steps: Clean the cold water inlet filter and flush the heat exchanger.
How to resolve Navien Water Heater error code E030?
If you see error code E030, try these steps: Clean the cold water inlet filter and flush the heat exchanger.
How to fix Navien NPE-210S2 Water Heater error E004?
If you see error code E004, make sure the electrical cord is properly grounded.
What to do if no water comes out of my Navien NPE-210S2 Water Heater?
If no water comes out when you open the hot water tap, make sure the shut-off valves on the hot and cold pipes are open. If an error code is displayed, refer to “5.2 Understanding Error Codes” on page 17.
What to do if Navien NPE-210S2 Water Heater displays error code E438?
If you see error code E438, check if the circulation pump is working correctly.
General| Type | Tankless |
|---|---|
| Category | Residential |
| Condensing | Yes |
| Energy Factor | 0.96 |
| Water Connection Size | 3/4" NPT |
| Gas Connection Size | 3/4" NPT |
| Voltage | 120V |
| Minimum Activation Flow Rate | 0.5 GPM |
| Fuel Type | Natural Gas |
| Minimum Input BTU | 15, 000 |
| Dimensions (H x W x D) | 26.5" x 17.7" x 10.2" |
| Temperature Range | 100°F to 140°F |
| Warranty | 15 years on heat exchanger, 5 years on parts |
| Maximum Input BTU | 199, 900 BTU/hr |
| Energy Efficiency | 96% (Natural Gas) / 95% (Propane) |
Explains DANGER, WARNING, CAUTION symbols and general safety statements.
Details ignition, gas leak detection, and response protocols for safe operation.
Offers advice on preventing burns and managing water temperatures, including scalding risks and charts.
Warns about risks from flammable materials, improper venting, and carbon monoxide poisoning.
Advises against touching electrical components with wet hands to prevent electric shock.
Covers essential safety precautions and checks before turning the water heater on.
Details how to safely modify the water temperature, with warnings about potential burns.
Provides a guide and chart for diagnosing and fixing basic issues encountered with the water heater.
Explains error codes displayed on the unit and offers remedies for each situation.
