navien

We recently purchased a 3-story duplex, and each unit had its own tank water heater, leading us to believe that the plumbing was separate for each unit. The heater on the 3rd floor of the upper unit (ours) was due for replacement, so we had our plumber replace it with a tankless Navien...

I hired a plumber to install a Navien 240a2. When I run the hot water in one my showers or faucets and then inspect the unit, the line labeled "HOT" feels cold and the line labeled "COLD" feels hot to the touch. The red valve is connected to a terminal that is labeled HOT The showers and...

Hi. We are deploying a number of the NPE-240A2 units and we were hoping to have the control by 30022717B(remote physical switch) as well as Navilink. We see the ability to have (2) 30022717B installed in parallel but not the option to have one 30022717B and one Navilink on the same NPE-240A2...

I have an NPE-210A2 and installed a Navicirc at the farthest faucet in the house from the water heater. I set it to external recirculation, moved the internal switch to external, and set NO below to use the internal pump, and set the recirc mode to "always on." Looking at the history on the...

I had a Navien NCB-180E Combi Boiler installed several years ago. Recently problems have developed with overheating combustion chamber, error code 001, and shutdown. The professional installer replaced the circulator pump in the unit as indicated by Navien customer support. The problem resolved...

Hi Everyone, I have just worked through a 003 error code, which was not supported by the Service manual. I could not find any record of this online so I thought I'd share in case anyone else sees the same problem. The point - the 150V supply from the transformer will mean the flame rod...

I've had a Navien NPE-240A2 installed since May with a NaviCirc at the end of my house. The unit does NOT have a T off the cold water line to the recirc inlet. The internal valve is set to EXT, the control panel is set to EXT with NO external pump. The recirc feature works as expected...

I recently had the Navien NCB 240-110H installed in my home and I'm trying to decide on the appropriate setting for "WWSD On Diff". The only info in the manual on this setting is on p. 107: "Set the differential temperature to deactivate the Warm Weather Shutdown." Link to the manual PDF...

Re: Navien NPE-240A, Internal Pump Only, External Recirculation and DIY install of HotButton (PZZZ-00046). The HotButton Installation Manual does not mention DIP switch settings. It specifies one parameter setting: P.12 (HotButton pump cycle time). Q1: Should I leave DIP switches 1, 2 and 3...

I’ll keep this as short as possible. I’ve read the manual and scoured the internet and have yet to find a clear answer here. I have a brand new Navien NCB 240e that so far has given me nothing but problems. However, I’m slowly finding out that my problems are from an incompetent installer and...

Hi, Should a Navien hydronic heating system turn on and off four to five times an hour? I am living in a place with a Navien CH-240 that drives domestic hot water and an in-floor, six-zone hydronic heating system. The hydronic system uses PEX tubes under a concrete floor. I have only ever had...

Hello, I checked through this forum, but couldn't find anything that seemed to address my problem. Here are the details of my issue, what I have done to address it, and finally, my questions. Water heater details: Navien NPE-240A Installed December 2013 External re-circulation loop installed...

Hi everyone, Aside from the internal circulating pump failing in September, the unit has been running without issue since its install 5 years ago. Everything was in order during my annual service 3 weeks ago by a Navien certified plumber. Starting 2 days ago, I noticed the thermostat calling...

I am curious what the best settings for my system would be as the installer has been less than helpful. This is our second winter here and after heating the house last year with the in floor it didn’t like to keep up in the very back corner of our house which happens to be the master bedroom. I...

Hello, I just had my Navien NPE-240A (EDIT: It's actually an NPE-240A2) and NaviCirc installed today. First time tankless user. I was reviewing the manual and installation after they left, and I don't think they have the NaviCirc hooked up properly, and I want to confirm before I call them back...

Hi All, I have a Navien NPE 240 A2 that was installed 3 months ago. I've noticed that in the mornings/first time I call for hot water the tankless will go through 4 short cycles before stabilizing and delivering hot water. The odd thing is the flow says 4.4-4.8 gpm which is inaccurate as I'm...

Hello! Apologies in advance for the long post, and thank you so much for any help provided! My home has 10 main floor radiators and 1 basement radiator, all cast iron and all fed by a monoflo system. We just had an old 1940's radiator (roughly similar to this one) replaced by a Navien NHB-80...

Hello, I recently updated my aging NR240A with a NPE240A2, and immediately it was a better experience. Water heats faster at fixtures, the fan noise is significantly less, principally in the 'post-purge' phase. After about a week of having it installed, i decided to create a dedicated hot water...

Was wondering if anyone knows what noise this could be from... Its a combo unit 2 zones attached Only happens when the unit comes on for heating the house.. does not come on during hot water mode.... This is a YouTube video of the noise Thanks again for looking

Six months or so ago I had an NPE 240A installed. I was set up with external recirc line (I think) but don't feel I'm getting much benefit. I'm waiting 1 min 30 seconds or longer for hot water to get to end of the line (kitchen sink ~60 feet from tankless). This is no big deal and I know it...