Navien Smart Plus User Reviews

Navien Smart Plus
Navien Smart Plus
KYUNGDONG NAVIEN CO.,LTD

Top reviews

Energy usage doesn’t work

On the whole ok but annoying when things change such as frost protection temperature changes

So disappointing 😞

New boiler, lots of promises and hype about the phone app. Has got better but loses info - history and glitches so all of a sudden it goes into holiday mode.

Holiday doesn’t work

Each time we set our house to holiday it broke and we could not turn it back on through the app

Recent updates have improved stability 11/25

I have been using this app for over a year now and am familiar with it. Recent updates have improved stability and it is a pleasure to use. Well done Navien developer team👏😀!

Smart App

As others have said the Smart app is very temperamental and typically requires the app to be fully closed and restarted. If buying again I would consider trying to find another form of smart controller as the Navien version is very poor

Leave well alone

The worst system ever. App is awful, boiler inefficient and unreliable. Out of action more times than it’s working. Would love to replace the whole thing

MRS JO

Very temperamental boiler and the APP is very annoying and unreliable. Very disappointed and would change to another boiler in a heartbeat.

Feedback

So love my Navien but my one grip is the timer on the app. It’s awful, your old one was must better. Can we please have it back 🤞🤞🤞

Could be really good

If the system has a fault the only way you know is when you notice the heating has not come on or if you happen to notice the error code on the thermostat! If Navien used the App to show error codes then you would know instantly because your device would be able to inform you, if set, immediately…

Not the best

Needs to be improved have to keep logging out and back in to get working, I had a hive system before this one and the hive worked perfect, so a huge disappointment, I was expecting better being the same brand as the boiler

Unreliable

Slow and often does not work.

Glitches

Good but the app glitches a lot. The data and graphs don’t work even though the boiler is connected. All in all I think you get what you pay for with the thermostat. Turning the heating on and off was the selling point really but the data and graphs would be much better to calculate usage etc.

If Navien invested a bit more time and money into the app they’d be on to a winner for sure
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App no longer works. Disappointing!!!

App won’t load. It used to work perfectly. I’ve deleted and reinstalled the app multiple times. I’ve spoken with Navien Tech Support who said they’re working on the app. I saw a ‘bug fix’ update 23 hours ago and got excited to try again. Same issue! Very disappointing.

Horrendous app

Who designed this? The schedule interface is ridiculously contrived and difficult to work with, the boosts don’t have durations, the thermostat has a mind of its own. Wish I could use ANYTHING else.

Crashing

App is constantly crashing when clicking on it. It won’t even open

Horrendous app constantly down

This app is genuinely embarrassing for such a big company. It constantly crashes and in the last week (jan 2025) it doesn’t even allow you to log in. Contact customer services and spoke to a technician and he wasn’t even willing to log onto the app himself to see what the app is doing.

Unusable app

We can no longer use the app to control our heating & hot water. The smart plus control indicates it’s pared with our wifi but every time we open the app it says ‘loading’ and then changes to ‘offline’ - useless. Using the thermostat to control everything is very clunky and obviously can’t be used remotely.

Customer service extremely unhelpful - suggested it was us and not the app at fault.
Not a great experience when a company doesn’t pay any attention to customer feedback.
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Does this app ever get updated?

Had my boiler (and this app) for 2 years now, there’s not been a single update which is surprising as it’s very glitchy. Half the features don’t work, I can turn my heating on and off, and set to holiday mode, that’s it. Even then I have to restart the app several times. Really does need someone to look in to it, but there’s no customer service?
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Terrible !!!!!

Can’t even sign up and make an account through the app to fully review. Keeps telling me my two passwords don’t match THEN tells me I have an incorrect password. How? I haven’t even signed up. Attempted to log in using both different passwords and obviously tells me I don’t have an account. No option to sign up through web. AWFUL UX !
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Doesn’t work. App crashing all the time.

Tried reinstalling app. But still doesn’t work. Whats the point of paying for extra hardware to make it smart but it doesn’t work. Get your act together devs.