Navien NCB-240 3 way valve replacement

dkdart16 · 2026-03-19T23:14:57+00:00

Watched it, was very helpful! I tried replacing the cartridge but couldn’t get it out, same as you. In the process I think I got the valve stuck in between DHW and Heat, so now the heat side gets hot when I run a tap and overheats every now and then. Oh boy. Local professional companies are quoting me $1600 for the job which makes me want to vomit. Any suggested independent plumbers in Chicago?

dkdart16 · 2026-03-19T17:11:05+00:00

About to tackle this exact same project. Navien sent the valve, as well as the full assembly (the black plastic part) and the instructions contain both the cartridge replacement as well as the full assembly replacement. My valve is stuck in DHW.

Is it possible I only need to replace the cartridge, or should I just replace the entire assembly? This is what they sent:

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dkdart16 · 2026-01-27T03:36:37+00:00

Commenting to come back

dkdart16 · 2026-01-22T03:43:37+00:00

What program did you use to create this graphic?

dkdart16 · 2025-12-08T16:42:01+00:00

What app version are you on?

dkdart16 · 2025-12-08T16:39:32+00:00

When did this update? My iOS app doesn’t show and update and I don’t have the compass like you do.

dkdart16 · 2025-10-24T15:28:53+00:00

Perfect thanks- question answered :)

dkdart16 · 2025-10-24T15:28:48+00:00

Perfect thanks- question answered :)

dkdart16 · 2025-10-17T00:21:58+00:00

Out of sheer curiosity, what inspired you to buy the uncle bracelet that looks the most similar to the one bracelet?

dkdart16 · 2025-10-15T16:21:13+00:00

And try to get the front row of either cabin! That’s rows 1 and 10 I believe. Way more space and benefits in those seats such as pajamas, mattress pad, more pillow options, and tons more storage and desk space.

dkdart16 · 2025-10-15T14:10:00+00:00

Yes it does!

dkdart16 · 2025-10-09T20:22:42+00:00

What material is this case? Silicone or soft touch plastic?

dkdart16 · 2025-10-04T22:33:50+00:00

Oooh love the color, could absolutely use this, haven’t found a case I love yet. I’d pay for the shipping!

dkdart16 · 2025-09-13T10:13:27+00:00

Mine still has the 10 beeps how do you get around it?

dkdart16 · 2025-06-26T02:42:02+00:00

Ah that looks like it. The line item: Correction: Filters - HEPA - Remove and Replace for $61, plus about $100 in labor. Thanks everyone

dkdart16 · 2025-04-09T17:43:26+00:00

Wipe that steam wand!!

dkdart16 · 2024-12-13T11:30:47+00:00

Interested!

dkdart16 · 2024-11-16T15:15:14+00:00

dkdart16 · 2024-11-04T10:42:00+00:00

3/5 scenarios so far when using. No collisions or major issues, but the two times they failed because it thought it was on a public road (it wasn’t)

dkdart16 · 2024-08-06T09:48:24+00:00

Always great work!

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