How do I reset my navien NCB 240e?

To reset the boiler, press the Reset button. Support at 1-800-519-8794. Segments for 5 seconds. Temperature of hot water is to be set at 120°F.

What should inlet temp be on navien nr-240a?

It’s looking for an inlet water temp of about 50* to be heated to 125*. That’s how it’s designed. Its modulation is there to mach varying gpm, not varying inlet temp (for the most part). The heat box is returning warm water to the inlet of the tankless which is something it doesn’t want; it wants cold water.

What to do if your navien water heater has an error code?

Some problems can be solved with simply resetting the water heater unit (press the Reset button on the front panel) but other require more work. Below you’ll find the most common error codes for a Navien tankless water heater along with a suggested fix.

Is the navien heat box connected to the tap?

While the tap is off, the Heat Box calls for water again and the Navien kicks back in. -Turn Domestic water on again (after 15 second in line above) and the Navien does supply Hot water to the domestic tap just fine.

Why does my navien not recognize the domestic call?

However, it seems that Navien doesn’t recognize the domestic call. Now the LCD just shows the Re-circ icon. Water tem to the domestic tap plummets in temp (as the Navien isnt heating water). -Shut off the domestic tap for 10-15 seconds.

Are there any heating issues with the navien nr-240a?

After the initial install of our CR-240A (taps often would not return heated water, we had some leaking from bad fittings, etc.), we had a number of issues that required a complete warranted replacement. We now have a NR-240A unit and we were excited to have problems behind us.

Why is my navien radiant heating not working?

This may be the source of your problems if the return from the radiant is sending warm water back to the unit. Also, a re-circ line should not be connected directly to it as that will cause the same issue. Navien makes a combi unit that IS designed to do both, model CH.

How old is the navien hot water heater?

Unit is 3 years old Multiple problems – leaks- lace of heat – constant shut offs Motherboard issue Do not respond to plumbers Had enough. Replacing with Bosch User’s recommendation: Avoid.

What is error code 03 on navien water heater?

Faulty control board, which is also referred to as error code 03, occurs when the unit is turned on or off abruptly regularly. Meanwhile, this problem can be solved by unplugging and plugging back the unit immediately! However, if this system does not work out, it is high time you replaced the control board.