Buy something else
When you pay thousands of dollars for an on-demand water heater you just want it to work when you need it. Neither the WiFi nor
The Bluetooth button recirc feature stays connected. As many others have stated, it constantly falls offline, making the recirculation feature (sending hot water to the far end of your house so you don’t need to run the tap for minutes) virtually useless.
The Bluetooth button recirc feature stays connected. As many others have stated, it constantly falls offline, making the recirculation feature (sending hot water to the far end of your house so you don’t need to run the tap for minutes) virtually useless.
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Useless app do not download
The title says it all, absolutely useless app, the only purpose behind it is data collection, they make you register only to find out that there’s no benefit from having the app and that your data was their only goal.
Functional but Inconsistent
Connects to WiFi and allows scheduling for recirculation, but WiFi connection status icon frequently switches between connected and disconnected, which makes the app seem unreliable.
Useless
Downloaded this app to control my newly installed RXP199i Hot Water tank as advertised on the unit. It’s telling me that I need a professional installers account to connect to the tank. Sure, I can register the tank through the app, but I could do that through a website too. Why can’t homeowners access their own device?
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Broke my unit, cost me $$$
Whatever they did recently to the Wifi module/app caused my water heater to go into a test cycle with no way of turning it off. Had to have a tech come out to reconnect the manual triggers.
Open
The app is frozen and not working for some reason and called the company but don’t know why it’s doing it or what the solution would be, very frustrating and disappointing
Broken Again
They fix it and break it repeatedly. They broke it again. This time the timer to recirculate is grayed-out and unavailable. Repeatedly restarting the app sometimes helps. If you don’t allow notifications it pesters for it on EVERY use. Logging out and logging back in doesn’t fix it. Horrible developers.
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Bluetooth won’t connect
Set up the apparatus- yes, it is possible on your own. The apparatus works great except the bluetooth won’t connect. Pretty lame in 2026 you can’t get the digital part right.
Trash. Useless can’t rate 0
I couldn’t imagine a more useless app. As far as buying Rinnai ever again I don’t think it would ever happen. It’s 2026, technology is not that difficult. Maybe you should get a new IT team. A 12 year old could make a better app. Expensive and non conforming… great combo.
Won’t work with Alexa
Everyone else is compatible with voice apps. Plz make this a priority! We have three tanks.
Complex useless
Despite claiming you can connect an RXP199i water heater via bluetooth with the app, there appears to be zero support for Bluetooth connectivity.
I’m embarrassed for whoever developed and documented this useless piece of code.
I’m embarrassed for whoever developed and documented this useless piece of code.
Terrible app WiFi issues
This app is terrible lately. It never connects to WiFi and you have to force close the app like 5 different times until it finally connects to your phone. Completely useless and unreliable. Who are the developers??
Worthless
This app is worthless. You’d think a company like Rinnai that makes decent tankless water heaters could develop an app for the end user. Understanding how rot navigate the app sucks. It doesn’t allow the end users to adjust parameters. The connectivity is spotty with the WIFI module. Go back to the drawing board Rinnai and give us something that can function other than toggling buttons.
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No Notifications
Whenever there’s an error on my water heater, the app, although connected properly and into the Internet, does not send out any notifications whatsoever as the entire reason I bought the wireless module.
Connectivity
Horrible app. Wi-Fi loses connectivity all the time even though my mesh router is extremely close to the unit. Customer support is extremely difficult to get hold of and no option for telephone call.
Recirculation still not right
App shows disconnected 50% of the time when you open it. Have to close and reopen it to use it.
Ridiculous
I’ve used this app for more than a year without problems. Now it wants me to associate my company, which is in their registry. app refuses to save changes, and is locked up now I have to take the panel off every water heater. I do to manually push buttons to set something up that takes two seconds with the app. Not a big deal. Set up 20 of them for at a time. Unacceptable. Tech Support for this company is absolutely outstanding. However, whoever’s running this app is rapidly eroding the Goodwill you’re fantastic Tech Support department has built up. Fix this, or Fire, the person in charge of it, and find somebody who can.
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Useless
I had thought it would give me access to my boiler without having to use the keypad. It does almost nothing except provides a little blue night light. Waste of money.
Rarely works
One of the draws for me of a tankless water heater was the ability to be able to start the recirculation process from my phone with this app. Unfortunately, the app only worked for a few months. I have tried every single suggestion to get the “start recirculation“ button to be usable again to no avail. This app is worthless and has nullified the benefits of having a tankless water heater.
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Update the App!
Please, for the love of GOD, allow end-users to delete “alerts.” There was an annual alert that was triggered and I must have over ~100 notifications from 10 months ago that I cannot delete !! Get with the times you guys/gals and allow end-users to clear out old notifications. Even if I had a new alert, damn near impossible to know if it’s an old one a new or what!
Secondly, make the update WiFi module button more dynamic! If I don’t a firmware upgrade, get rid of the button! It’s constantly present even after I’ve updated the module making it appear as if I need to update the module still.
Secondly, make the update WiFi module button more dynamic! If I don’t a firmware upgrade, get rid of the button! It’s constantly present even after I’ve updated the module making it appear as if I need to update the module still.
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