Unluckily, it occurs always at an unpropitious time. I called Navien support and was told to read the PSI after I plug out and in the system. Navien heater. Our Navien ncb-240e has an error code e.351. Navien error code E205 indicates a problem with the operation of the heating supply thermistor. Manage Settings Its because I broke down the meaning and the reason behind a specific error message. Navien e351 error code E351 - Abnormal Auto feeder valve If the water pressure sensor senses low water level as the heating pipe pressure is low, the system stops operation of the boiler, and refills water automatically. Apparently the pressure is low and need to fill up. Alternatively, you can contact the technical support team at 1-800-519-8794 for help. Check and clean the cold water filter and strainer, and flush the heat exchanger. PROBLEM: Thermistor open or short circuited (cold water inlet 2). Change the thermistor if needed. Error code 351 was flashing on the LCD screen with a red wrench symbol as well. All of our technicians are licensed and insured. This can happen because of dirty air intake filters. Check if water leaks due to a defective heat exchanger. And lastly, verify the recirculation pump is working normally. Otherwise, you will not get sufficient power supply to turn the unit on. This is where its at right now. You will be able to take action to resolve it at the right time. They had me do a reset and then shut off the unit by plugging off and then plugging back in. Just as before, you may be able to fix this yourself by adding water to the boiler, which in turn increases the pressure. If your Navien displays an error code E060, you need to check the dual venturi connection. Troubleshooting tips in RED should be done by your local professionals at Texas Water Heaters. Theres nothing worse than turning on the tap and getting cold water when you were expecting hot. Coast-to-Coast Coverage 7 days/week, 363 days per year(Closed Christmas Day and New Year Day). It is not a common issue, but you should be aware of it. To fix and troubleshoot Navien error code E016, switch the unit off for 30 seconds and then back on. To troubleshoot Navien error code E109, check and clean, if necessary, the air intake filter and the fan motor. A place for homeowners, renters, tenants, business owners or anyone with a general question about their HVAC system. Just today. When the heat exchanger starts to crack, it means there is a gap, and destructive exhaust gasses could enter your residence. Contractor Support is Crucial! I already covered a guide on Navien E438 Error Code. Next, I suggest you check the flame rod to see whether scale forms on it or not. FIX:Turn off the water heater for 30 minutes and restart. Obviously, it is not a pleasant experience, but it will help you figure out what is wrong with your unit. Get in touch with Navien technical support at 800-519-8794. If the error code persists, measure the PCBs voltage and replace the fan if the voltage is within spec. The Navien boiler error code e302 also relates to low pressure in your system. Cleaning the air intake filter is the only solution to fix the air pressure issue. To fix this error code, inspect the heating supply thermistors condition and the pump wiring connectors.
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